Müller A.

Palaearctic Protosmia bees of the subgenus Chelostomopsis (Megachilidae, Osmiini): biology, taxonomy and key to species

. Zootaxa [Internet]. 2017 Feb. 2 [cited 2025 Jul. 6];4227(2):287–294. Available from: https://www.mapress.com/zt/article/view/zootaxa.4227.2.9