Gorlov, P., S. Winter, and A. Schevtsov. 1. “Common Crane (Grus Grus) in the Izyum Luka: Longstanding Dynamics of Population As a Response to Changes in the Habitat”. The Journal of V.N.Karazin Kharkiv National University. Series «Biology» 28 (1), 145-54. https://doi.org/10.26565/2075-5457-2017-28-19.