Rasmussen C, Ascher JS. Heinrich Friese (1860–1948): Names proposed and notes on a pioneer melittologist (Hymenoptera, Anthophila). Zootaxa [Internet]. 2008 Jul. 30 [cited 2025 Apr. 3];1833(1):1–118. Available from: https://mapress.com/zt/article/view/zootaxa.1833.1.1