“Diagnostic Value of Some Morphological Characteristics Useful for Discriminating the Subgenera OfBombus Latreille S.l. and Psithyrus Lepeletier S.L. (Hymenoptera Apidae Bombinae)”. 2024. Bollettino Di Zoologia Agraria E Bachicoltura 34 (3): 405-27. https://test-ojs-unimi-it.archicoop.it/index.php/bzab/article/view/27074.