Kuhlmann, Michael, and Maxim Yu. Proshchalykin. “The Bees of the Genus Colletes Latreille 1802 of the European Part of Russia, With Keys to Species (Hymenoptera: Apoidea: Colletidae)”. Zootaxa 3878, no. 3 (October 24, 2014): 201–247. Accessed April 30, 2025. https://mapress.com/zt/article/view/zootaxa.3878.3.1.