Olszewski, P., Ljubomirov, T., Wiśniowski, B., Kowalczyk, J.K. & Krzyżyński, M. (2016)

New records of the genus Diodontus Curtis, 1834 (Hymenoptera: Crabronidae) from Bulgaria, Montenegro and Poland, with a key to Central and Eastern European species

. Zootaxa, 4061 (2), 164–172.