“Diagnostic Value of Some Morphological Characteristics Useful for Discriminating the Subgenera OfBombus Latreille S.l. and Psithyrus Lepeletier S.L. (Hymenoptera Apidae Bombinae)”. Bollettino di zoologia agraria e bachicoltura 34, no. 3 (October 30, 2024): 405–427. Accessed July 28, 2026. https://test-ojs-unimi-it.archicoop.it/index.php/bzab/article/view/27074.