Banik, M. 2019. Trends and synchrony in fluctuations of the numbers of Whinchat (Saxicola rubetra) and European Stonechat (S. rubicola) in chalk steppe of North-eastern Ukraine. The Journal of V.N.Karazin Kharkiv National University. Series «Biology». 32, (Jun. 2019), 45-51. DOI:https://doi.org/10.26565/2075-5457-2019-32-5.