1. Токарський В.А. Gophers Spermophilus suslicus (Guldenst., 1769) and Spermophilus pygmaeus (Pallas, 1778) at the junction of their areas (Report 1. Past distribution) // The Journal of V.N.Karazin Kharkiv National University. Series «Biology». 2013. № 1079 (18). C. 138-143.