Reference

V. M. Ermolenko (1984): [Solitary bees]; [Ru; 5 maps, 5 col. figs. Date: 30.III.1984]. – In: BORODIN, A. M. (ed.). The Red Data Book of the USSR. Rare and Endangered Species of Animal and Plants. Vol. 1 [Animals]. The 2nd Edition. Moscow (Lesnaya Promyshlennost) – : 269 - 273.