Engel, M. S. (2008). A new species of Chiasmognathus from Iran, with a note on Chiasmognathus aegyptiacus in Israel (Hymenoptera: Apidae). Contributions to Entomology = Beiträge Zur Entomologie, 58(2), 223-226. https://doi.org/10.21248/contrib.entomol.58.2.223-226