Reference

N. D. Kruglov (1997): [Bees]; [Ru; 10 maps, 10 col. figs. Date: 29.IX.1997]. – In: KRUGLOV, N. D. (editor-in-chief). The Red Data Book of the Smolensk Province. Rare and Endangered Species of Animals and Plants. Smolensk (Smolensk State Pedagogical Institute) – : 40 - 50.