“A dichotomic key of the males of Thoracobombus Dalla Torre, subgenus of Bombus Latreille, present in Italy”, bzab, vol. 38, no. 1, pp. 27–38, Sep. 2024, Accessed: Jul. 28, 2026. Available: https://test-ojs-unimi-it.archicoop.it/index.php/bzab/article/view/26487