Fedoriak, M. M., L. I. Tymochko, O. O. Shkrobanets, A. V. Zhuk, O. F. Deli, S. S. Podobivskiy, V. G. Mikolaychuk, O. O. Kalynychenko, U. V. Leheta, and O. D. Zarochentseva. 2020. “Results of Standardized Beekeeper Survey of Honey Bee Colony Losses in Ukraine for Winter 2018-2019”. Visnyk of V. N. Karazin Kharkiv National University Series «Еcоlogy», no. 23 (November), 124-38. https://doi.org/10.26565/1992-4259-2020-23-11.