1. Fedoriak M.M., Tymochko L.I., Shkrobanets O.O., Zhuk A.V., Deli O.F., Podobivskiy S.S., Mikolaychuk V.G., Kalynychenko O.O., Leheta U.V., Zarochentseva O.D. Results of Annual Monitoring of Honey Bee Colony Winter Losses in Ukraine: Winter 2019–2020 // Visnyk of V. N. Karazin Kharkiv National University. Series Еcоlogy. 2021. № 25. C. 111-124.