TY  - CONF
AU  - Živić, Ivana
AU  - Božanić, Milenka
AU  - Miličić, Dragana
AU  - Marković, Vanja
AU  - Petrović, Ana
AU  - Đuretanović, Simona
AU  - Zorić, Katarina
AU  - Tomović, Jelena
AU  - Ćetković, Aleksandar
AU  - Jović, MIloš
AU  - Gojšina, Vukašin
AU  - Petković, Matija
AU  - Stojanović, Katarina
PY  - 2022
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/6566
AB  - Slatkovodni ekosistemi su, zbog sve izraženijeg antropogenog pritiska (zagađivanje, izgradnja brana i hidroelektrana, regulacija tokova, degradacija staništa, eksploatacija šljunka, klimatske promene...), najugroženiji od svih ekosistema na Zemlji. Navedene aktivnosti imaju nesagledive negativne efekte na akvatične beskičmenjake koji ceo ili deo svog životnog veka provode u vodi. U toku 2021. godine izvršena je procena stepena ugroženosti akvatičnih beskičmenjaka na osnovu IUCN kriterijuma. Uzimajući u obzir samo najugroženije kategorije prema IUCN kriterijumima (CR, EN, VU, NT), 82 vrste vodenih beskičmenjaka u Srbiji je ugroženo i predloženo za Crvenu knjigu akvatičnih beskičmenjaka. Larve i adulti vodenih insekata (35 vrsta) i slatkovodni rakovi (34 vrste) su najugroženiji, a pored njih ugroženo je i 10 puževa, dve školjke i jedna medicinska pijavica. Za 26 vrsta predložen je status kritično ugrožene vrste (CR), 23 su sa statusom ugrožene vrste (EN), ranjivih vrsta (VU) ima 17, dok je 7 vrsta gotovo ugroženo (NT). Pored nabrojanih, za 8 vrsta nema dovoljno podataka o ugroženosti (nedovoljno poznate vrste, DD), a vilinski konjic Leucorrhinia caudalis sa područja Srbije je isčezao (RE). Veliki broj ugroženih vrsta vodenih makroinvertebrata u Srbiji, među kojima su endemiti i stenoendemiti, ukazuje na „alarmantno“ stanje pre svega zbog staništa koja ovi organizmi naseljavaju, te bi zaštita istih svakako bio prioritet. Veoma važno je preduzeti sve mere, kako zakonske tako i naučne, kako navedene ugrožene vrste ne bi u skorijoj budućnosti iščezle sa prostora Srbije. Svakako da bi Crvena knjiga akvatičnih beskičmenjaka trebala da bude polazna osnova za sve aktivnosti, koje mogu da preuzmu nadležne institucije i nevladine organizacije u Srbiji, u cilju zaštite vodenih staništa i ugroženih vrsta vodenih beskičmenjaka.
AB  - Слатководни екосистеми су, због све израженијег антропогеног притиска
(загађивање, изградња брана и хидроелектрана, регулација токова, деградација
станишта, експлоатација шљунка, климатске промене...), најугроженији од свих
екосистема на Земљи. Наведене активности имају несагледиве негативне ефекте на
акватичне бескичмењаке који цео или део свог животног века проводе у води. У
току 2021. године извршена је процена степена угрожености акватичних
бескичмењака на основу IUCN критеријума. Узимајући у обзир само најугроженије
категорије према IUCN критеријумима (CR, EN, VU, NT), 82 врсте водених
бескичмењака у Србији је угроженo и предложено за Црвену књигу акватичних
бескичмењака. Ларве и адулти водених инсеката (35 врста) и слатководни ракови
(34 врсте) су најугроженији, а поред њих угрожено је и 10 пужева, две шкољке и
једна медицинска пијавица. За 26 врста предложен је статус критично угрожене
врсте (CR), 23 су са статусом угрожене врсте (EN), рањивих врста (VU) има 17, док
је 7 врста готово угрожено (NT). Поред набројаних, за 8 врста нема довољно
података о угрожености (недовољно познате врсте, DD), а вилински коњиц
Leucorrhinia caudalis са подручја Србије је исчезао (RE). Велики број угрожених
врста водених макроинвертебрата у Србији, међу којима су ендемити и
стеноендемити, указује на „алармантно“ стање пре свега због станишта која ови
организми насељавају, те би заштита истих свакако био приоритет. Веома важно је
предузети све мере, како законске тако и научне, како наведене угрожене врсте не
би у скоријој будућности ишчезле са простора Србије. Свакако да би Црвена књига
акватичних бескичмењака требала да буде полазна основа за све активности, које
могу да преузму надлежне институције и невладине организације у Србији, у циљу
заштите водених станишта и угрожених врста водених бескичмењака.
PB  - Belgrade: Serbian Biological Society
C3  - Knjiga sažetaka: Treći Kongres biologa Srbije: Osnovna i primenjena istraživanja: Metodika nastave; 2022 Sep 21-25; Zlatibor, Serbia
T1  - Akvatični beskičmenjaci – ugroženi taksoni Srbije
T1  - Акватични бескичмењаци – угрожени таксони Србије
SP  - 173
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_6566
ER  - 

@conference{
author = "Živić, Ivana and Božanić, Milenka and Miličić, Dragana and Marković, Vanja and Petrović, Ana and Đuretanović, Simona and Zorić, Katarina and Tomović, Jelena and Ćetković, Aleksandar and Jović, MIloš and Gojšina, Vukašin and Petković, Matija and Stojanović, Katarina",
year = "2022",
abstract = "Slatkovodni ekosistemi su, zbog sve izraženijeg antropogenog pritiska (zagađivanje, izgradnja brana i hidroelektrana, regulacija tokova, degradacija staništa, eksploatacija šljunka, klimatske promene...), najugroženiji od svih ekosistema na Zemlji. Navedene aktivnosti imaju nesagledive negativne efekte na akvatične beskičmenjake koji ceo ili deo svog životnog veka provode u vodi. U toku 2021. godine izvršena je procena stepena ugroženosti akvatičnih beskičmenjaka na osnovu IUCN kriterijuma. Uzimajući u obzir samo najugroženije kategorije prema IUCN kriterijumima (CR, EN, VU, NT), 82 vrste vodenih beskičmenjaka u Srbiji je ugroženo i predloženo za Crvenu knjigu akvatičnih beskičmenjaka. Larve i adulti vodenih insekata (35 vrsta) i slatkovodni rakovi (34 vrste) su najugroženiji, a pored njih ugroženo je i 10 puževa, dve školjke i jedna medicinska pijavica. Za 26 vrsta predložen je status kritično ugrožene vrste (CR), 23 su sa statusom ugrožene vrste (EN), ranjivih vrsta (VU) ima 17, dok je 7 vrsta gotovo ugroženo (NT). Pored nabrojanih, za 8 vrsta nema dovoljno podataka o ugroženosti (nedovoljno poznate vrste, DD), a vilinski konjic Leucorrhinia caudalis sa područja Srbije je isčezao (RE). Veliki broj ugroženih vrsta vodenih makroinvertebrata u Srbiji, među kojima su endemiti i stenoendemiti, ukazuje na „alarmantno“ stanje pre svega zbog staništa koja ovi organizmi naseljavaju, te bi zaštita istih svakako bio prioritet. Veoma važno je preduzeti sve mere, kako zakonske tako i naučne, kako navedene ugrožene vrste ne bi u skorijoj budućnosti iščezle sa prostora Srbije. Svakako da bi Crvena knjiga akvatičnih beskičmenjaka trebala da bude polazna osnova za sve aktivnosti, koje mogu da preuzmu nadležne institucije i nevladine organizacije u Srbiji, u cilju zaštite vodenih staništa i ugroženih vrsta vodenih beskičmenjaka., Слатководни екосистеми су, због све израженијег антропогеног притиска
(загађивање, изградња брана и хидроелектрана, регулација токова, деградација
станишта, експлоатација шљунка, климатске промене...), најугроженији од свих
екосистема на Земљи. Наведене активности имају несагледиве негативне ефекте на
акватичне бескичмењаке који цео или део свог животног века проводе у води. У
току 2021. године извршена је процена степена угрожености акватичних
бескичмењака на основу IUCN критеријума. Узимајући у обзир само најугроженије
категорије према IUCN критеријумима (CR, EN, VU, NT), 82 врсте водених
бескичмењака у Србији је угроженo и предложено за Црвену књигу акватичних
бескичмењака. Ларве и адулти водених инсеката (35 врста) и слатководни ракови
(34 врсте) су најугроженији, а поред њих угрожено је и 10 пужева, две шкољке и
једна медицинска пијавица. За 26 врста предложен је статус критично угрожене
врсте (CR), 23 су са статусом угрожене врсте (EN), рањивих врста (VU) има 17, док
је 7 врста готово угрожено (NT). Поред набројаних, за 8 врста нема довољно
података о угрожености (недовољно познате врсте, DD), а вилински коњиц
Leucorrhinia caudalis са подручја Србије је исчезао (RE). Велики број угрожених
врста водених макроинвертебрата у Србији, међу којима су ендемити и
стеноендемити, указује на „алармантно“ стање пре свега због станишта која ови
организми насељавају, те би заштита истих свакако био приоритет. Веома важно је
предузети све мере, како законске тако и научне, како наведене угрожене врсте не
би у скоријој будућности ишчезле са простора Србије. Свакако да би Црвена књига
акватичних бескичмењака требала да буде полазна основа за све активности, које
могу да преузму надлежне институције и невладине организације у Србији, у циљу
заштите водених станишта и угрожених врста водених бескичмењака.",
publisher = "Belgrade: Serbian Biological Society",
journal = "Knjiga sažetaka: Treći Kongres biologa Srbije: Osnovna i primenjena istraživanja: Metodika nastave; 2022 Sep 21-25; Zlatibor, Serbia",
title = "Akvatični beskičmenjaci – ugroženi taksoni Srbije, Акватични бескичмењаци – угрожени таксони Србије",
pages = "173",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_6566"
}

Živić, I., Božanić, M., Miličić, D., Marković, V., Petrović, A., Đuretanović, S., Zorić, K., Tomović, J., Ćetković, A., Jović, M., Gojšina, V., Petković, M.,& Stojanović, K.. (2022). Akvatični beskičmenjaci – ugroženi taksoni Srbije. in Knjiga sažetaka: Treći Kongres biologa Srbije: Osnovna i primenjena istraživanja: Metodika nastave; 2022 Sep 21-25; Zlatibor, Serbia
Belgrade: Serbian Biological Society., 173.
https://hdl.handle.net/21.15107/rcub_ibiss_6566

Živić I, Božanić M, Miličić D, Marković V, Petrović A, Đuretanović S, Zorić K, Tomović J, Ćetković A, Jović M, Gojšina V, Petković M, Stojanović K. Akvatični beskičmenjaci – ugroženi taksoni Srbije. in Knjiga sažetaka: Treći Kongres biologa Srbije: Osnovna i primenjena istraživanja: Metodika nastave; 2022 Sep 21-25; Zlatibor, Serbia. 2022;:173.
https://hdl.handle.net/21.15107/rcub_ibiss_6566 .

Živić, Ivana, Božanić, Milenka, Miličić, Dragana, Marković, Vanja, Petrović, Ana, Đuretanović, Simona, Zorić, Katarina, Tomović, Jelena, Ćetković, Aleksandar, Jović, MIloš, Gojšina, Vukašin, Petković, Matija, Stojanović, Katarina, "Akvatični beskičmenjaci – ugroženi taksoni Srbije" in Knjiga sažetaka: Treći Kongres biologa Srbije: Osnovna i primenjena istraživanja: Metodika nastave; 2022 Sep 21-25; Zlatibor, Serbia (2022):173,
https://hdl.handle.net/21.15107/rcub_ibiss_6566 .

TY  - CONF
AU  - Stanisavljević, Ljubiša
AU  - Bila-Dubaić, Jovana
AU  - SImonović, Slađan
AU  - Plećaš, Milan
AU  - Davidović, Slobodan
AU  - Tanasković, Marija
AU  - Ćetković, Aleksandar
PY  - 2022
UR  - http://www.parconazionalepantelleria.it/international_meeting_apis_silvatica.php
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/5965
AB  - In the modern world managed bee species are necessary for the stability and sustainability of food production, of which the western honey bee (Apis mellifera) is the best known and the single most important species (Kevan, 2007). Wild honey bees have largely become extinct throughout Europe since the 1980s, following the introduction of the ectoparasitic mite Varroa destructor and various pathogens associated with it (Crane, 1999). The honey bee has been the subject of extensive research around the world for decades, particularly in terms of preserving the health and stability of their colonies under these new pressures. In that period, the importance of rare, accidentally surviving wild and feral colonies of honey bees was largely neglected. However, several recent studies (e.g., Le Conte et al., 2007) report on the growing number of colonies that have successfully survived the Varroa mite infestation without usual chemical treatments.
Unlike in other studies on unmanaged colonies, we presented a special case of the free-living population of honey bee in a large and highly populated urban environment of Belgrade, the capital of Serbia (Southeast Europe). During the period 2011–2017, we collected a large set of observational data (>1,300 records) from the apparently dense wild/feral honey bee population. Large share of these records can not be spatially related to the existence of managed apiaries, which are very rare in the core of downtown Belgrade. We hypothesized that numerous unmanaged bee colonies and the high frequency of swarms indicate a stable, self-sustaining wild population, and not the regular influx of swarms from the managed apiaries situated more peripherally. Also, we elaborated on various plausible explanations for this extraordinary finding.
By geospatial analysis of different categories of occurrence (colonies and swarms observed in different habitats and micro-situations) in relation to the parameters of urban environments suitability for honey bees, we evaluated the patterns of distribution and long-term survival of feral colonies under urban conditions. The results indicate an extremely high and stable population density and unusually long persistence of feral colonies, which is a rare phenomenon on a global scale (Bila Dubaić et al., 2021). Previous isolated cases of unmanaged colony survival (unknown in urban conditions) triggered great scientific attention: understanding the factors behind these survival cases may contribute to the efforts on improving the managed honey bee health. Therefore, our results contribute to ongoing initiatives to support naturally selected resistance mechanisms against Varroa mites, and hopefully reduce the currently growing incidence of colony die-offs.
The collecting of data was based on opportunistic citizen science, which we hereby evaluate as a highly prospective approach in the study of wild/feral bees in urban areas. We believe that specifically designed citizen science projects, based on our experiences, could be implemented with a great success in other countries with similar highly urbanised circumstances; in particular, investigations should be focused on environments with comparable potentials for the unnoticed existence of unmanaged honey bees (Bila Dubaić et al., 2021).
Despite the growing global trend of urban beekeeping, little is known about the impact of urbanization on the genetic diversity of honey bees. In particular, we investigated and performed genetic analysis of 82 individual bee genomes in a portion of a sample of feral and managed honey bee colonies distributed throughout this large city, including highly urbanised areas. We established the existence of a high genetic differentiation between these two groups. Also, the comparison of mitochondrial and microsatellite DNA of bees sampled in Belgrade and in rural parts of Serbia showed that colonies of wild/feral bees have different patterns of genetic diversity. It can be concluded that urbanisation can be a positive driver of the genetic diversity of wild honey bees nesting in a highly urbanised and densely populated areas.
PB  - Isola di Pantelleria: Ente Parco Nazionale
C3  - First international meeting APIS SILVATICA: The western honey bee in nature; 2022 May 16-20; Pantelleria, Italy
T1  - Extraordinary incidence and persistence of feral honey bees in urban environments of Belgrade (Serbia)
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_5965
ER  - 

@conference{
author = "Stanisavljević, Ljubiša and Bila-Dubaić, Jovana and SImonović, Slađan and Plećaš, Milan and Davidović, Slobodan and Tanasković, Marija and Ćetković, Aleksandar",
year = "2022",
abstract = "In the modern world managed bee species are necessary for the stability and sustainability of food production, of which the western honey bee (Apis mellifera) is the best known and the single most important species (Kevan, 2007). Wild honey bees have largely become extinct throughout Europe since the 1980s, following the introduction of the ectoparasitic mite Varroa destructor and various pathogens associated with it (Crane, 1999). The honey bee has been the subject of extensive research around the world for decades, particularly in terms of preserving the health and stability of their colonies under these new pressures. In that period, the importance of rare, accidentally surviving wild and feral colonies of honey bees was largely neglected. However, several recent studies (e.g., Le Conte et al., 2007) report on the growing number of colonies that have successfully survived the Varroa mite infestation without usual chemical treatments.
Unlike in other studies on unmanaged colonies, we presented a special case of the free-living population of honey bee in a large and highly populated urban environment of Belgrade, the capital of Serbia (Southeast Europe). During the period 2011–2017, we collected a large set of observational data (>1,300 records) from the apparently dense wild/feral honey bee population. Large share of these records can not be spatially related to the existence of managed apiaries, which are very rare in the core of downtown Belgrade. We hypothesized that numerous unmanaged bee colonies and the high frequency of swarms indicate a stable, self-sustaining wild population, and not the regular influx of swarms from the managed apiaries situated more peripherally. Also, we elaborated on various plausible explanations for this extraordinary finding.
By geospatial analysis of different categories of occurrence (colonies and swarms observed in different habitats and micro-situations) in relation to the parameters of urban environments suitability for honey bees, we evaluated the patterns of distribution and long-term survival of feral colonies under urban conditions. The results indicate an extremely high and stable population density and unusually long persistence of feral colonies, which is a rare phenomenon on a global scale (Bila Dubaić et al., 2021). Previous isolated cases of unmanaged colony survival (unknown in urban conditions) triggered great scientific attention: understanding the factors behind these survival cases may contribute to the efforts on improving the managed honey bee health. Therefore, our results contribute to ongoing initiatives to support naturally selected resistance mechanisms against Varroa mites, and hopefully reduce the currently growing incidence of colony die-offs.
The collecting of data was based on opportunistic citizen science, which we hereby evaluate as a highly prospective approach in the study of wild/feral bees in urban areas. We believe that specifically designed citizen science projects, based on our experiences, could be implemented with a great success in other countries with similar highly urbanised circumstances; in particular, investigations should be focused on environments with comparable potentials for the unnoticed existence of unmanaged honey bees (Bila Dubaić et al., 2021).
Despite the growing global trend of urban beekeeping, little is known about the impact of urbanization on the genetic diversity of honey bees. In particular, we investigated and performed genetic analysis of 82 individual bee genomes in a portion of a sample of feral and managed honey bee colonies distributed throughout this large city, including highly urbanised areas. We established the existence of a high genetic differentiation between these two groups. Also, the comparison of mitochondrial and microsatellite DNA of bees sampled in Belgrade and in rural parts of Serbia showed that colonies of wild/feral bees have different patterns of genetic diversity. It can be concluded that urbanisation can be a positive driver of the genetic diversity of wild honey bees nesting in a highly urbanised and densely populated areas.",
publisher = "Isola di Pantelleria: Ente Parco Nazionale",
journal = "First international meeting APIS SILVATICA: The western honey bee in nature; 2022 May 16-20; Pantelleria, Italy",
title = "Extraordinary incidence and persistence of feral honey bees in urban environments of Belgrade (Serbia)",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_5965"
}

Stanisavljević, L., Bila-Dubaić, J., SImonović, S., Plećaš, M., Davidović, S., Tanasković, M.,& Ćetković, A.. (2022). Extraordinary incidence and persistence of feral honey bees in urban environments of Belgrade (Serbia). in First international meeting APIS SILVATICA: The western honey bee in nature; 2022 May 16-20; Pantelleria, Italy
Isola di Pantelleria: Ente Parco Nazionale..
https://hdl.handle.net/21.15107/rcub_ibiss_5965

Stanisavljević L, Bila-Dubaić J, SImonović S, Plećaš M, Davidović S, Tanasković M, Ćetković A. Extraordinary incidence and persistence of feral honey bees in urban environments of Belgrade (Serbia). in First international meeting APIS SILVATICA: The western honey bee in nature; 2022 May 16-20; Pantelleria, Italy. 2022;.
https://hdl.handle.net/21.15107/rcub_ibiss_5965 .

Stanisavljević, Ljubiša, Bila-Dubaić, Jovana, SImonović, Slađan, Plećaš, Milan, Davidović, Slobodan, Tanasković, Marija, Ćetković, Aleksandar, "Extraordinary incidence and persistence of feral honey bees in urban environments of Belgrade (Serbia)" in First international meeting APIS SILVATICA: The western honey bee in nature; 2022 May 16-20; Pantelleria, Italy (2022),
https://hdl.handle.net/21.15107/rcub_ibiss_5965 .

TY  - JOUR
AU  - Bila Dubaić, Jovana
AU  - Simonović, Slađan
AU  - Plećaš, Milan
AU  - Stanisavljević, Ljubiša
AU  - Davidović, Slobodan
AU  - Tanasković, Marija
AU  - Ćetković, Aleksandar
PY  - 2021
UR  - http://radar.ibiss.bg.ac.rs/handle/123456789/4708
AB  - It is assumed that wild honey bees have become largely extinct across Europe since the 1980s, following the introduction of exotic ectoparasitic mite (Varroa) and the associated spillover of various pathogens. However, several recent studies reported on unmanaged colonies that survived the Varroa mite infestation. Herewith, we present another case of unmanaged, free-living population of honey bees in SE Europe, a rare case of feral bees inhabiting a large and highly populated urban area: Belgrade, the capital of Serbia. We compiled a massive data-set derived from opportunistic citizen science (>1300 records) during the 2011–2017 period and investigated whether these honey bee colonies and the high incidence of swarms could be a result of a stable, self-sustaining feral population (i.e., not of regular inflow of swarms escaping from local managed apiaries), and discussed various explanations for its existence. We also present the possibilities and challenges associated with the detection and effective monitoring of feral/wild honey bees in urban settings, and the role of citizen science in such endeavors. Our results will underpin ongoing initiatives to better understand and support naturally selected resistance mechanisms against the Varroa mite, which should contribute to alleviating current threats and risks to global apiculture and food production security.
PB  - Basel: MDPI
T2  - Insects
T1  - Unprecedented Density and Persistence of Feral Honey Bees in Urban Environments of a Large SE-European City (Belgrade, Serbia)
IS  - 12
VL  - 12
DO  - 10.3390/insects12121127
SP  - 1127
ER  - 

@article{
author = "Bila Dubaić, Jovana and Simonović, Slađan and Plećaš, Milan and Stanisavljević, Ljubiša and Davidović, Slobodan and Tanasković, Marija and Ćetković, Aleksandar",
year = "2021",
abstract = "It is assumed that wild honey bees have become largely extinct across Europe since the 1980s, following the introduction of exotic ectoparasitic mite (Varroa) and the associated spillover of various pathogens. However, several recent studies reported on unmanaged colonies that survived the Varroa mite infestation. Herewith, we present another case of unmanaged, free-living population of honey bees in SE Europe, a rare case of feral bees inhabiting a large and highly populated urban area: Belgrade, the capital of Serbia. We compiled a massive data-set derived from opportunistic citizen science (>1300 records) during the 2011–2017 period and investigated whether these honey bee colonies and the high incidence of swarms could be a result of a stable, self-sustaining feral population (i.e., not of regular inflow of swarms escaping from local managed apiaries), and discussed various explanations for its existence. We also present the possibilities and challenges associated with the detection and effective monitoring of feral/wild honey bees in urban settings, and the role of citizen science in such endeavors. Our results will underpin ongoing initiatives to better understand and support naturally selected resistance mechanisms against the Varroa mite, which should contribute to alleviating current threats and risks to global apiculture and food production security.",
publisher = "Basel: MDPI",
journal = "Insects",
title = "Unprecedented Density and Persistence of Feral Honey Bees in Urban Environments of a Large SE-European City (Belgrade, Serbia)",
number = "12",
volume = "12",
doi = "10.3390/insects12121127",
pages = "1127"
}

Bila Dubaić, J., Simonović, S., Plećaš, M., Stanisavljević, L., Davidović, S., Tanasković, M.,& Ćetković, A.. (2021). Unprecedented Density and Persistence of Feral Honey Bees in Urban Environments of a Large SE-European City (Belgrade, Serbia). in Insects
Basel: MDPI., 12(12), 1127.
https://doi.org/10.3390/insects12121127

Bila Dubaić J, Simonović S, Plećaš M, Stanisavljević L, Davidović S, Tanasković M, Ćetković A. Unprecedented Density and Persistence of Feral Honey Bees in Urban Environments of a Large SE-European City (Belgrade, Serbia). in Insects. 2021;12(12):1127.
doi:10.3390/insects12121127 .

Bila Dubaić, Jovana, Simonović, Slađan, Plećaš, Milan, Stanisavljević, Ljubiša, Davidović, Slobodan, Tanasković, Marija, Ćetković, Aleksandar, "Unprecedented Density and Persistence of Feral Honey Bees in Urban Environments of a Large SE-European City (Belgrade, Serbia)" in Insects, 12, no. 12 (2021):1127,
https://doi.org/10.3390/insects12121127 . .