Reference

Józef Banaszak, L. Romasenko (1998): Megachilid Bees of Europe (Hymenoptera, Apoidea, Megachilidae). — 239 pp.; [En; 471 figs., 1 tab., 288 refs. Date: [31.XII].1998]. The 2nd edition (corrected and supplemented) printed in 2001. – Bydgoszcz (Pedagogical University of Bydgoszcz) – .