Proshchalykin MY, Kuhlmann M. The bees of the genus Colletes Latreille 1802 of the Ukraine, with a key to species (Hymenoptera: Apoidea: Colletidae). Zootaxa [Internet]. 2012 Sep. 18 [cited 2025 Jul. 4];3488(1):1–40. Available from: https://www.mapress.com/zt/article/view/zootaxa.3488.1.1