Reference

N. N. Blagoveshchenskaya (1997): The Biology and Ecology of Aculeates in the Ulyanovsk Province: Pollinators and Entomophages. — 232 pp., 1 col. pl.; [Ru; 35 figs., 150 refs. Date: 11.XI.1997]. – Ulyanovsk (Simbirskaya Kniga) – .