Olszewski, P.; Ljubomirov, T.; Wiśniowski, B.; Kowalczyk, J. K.; Krzyżyński, M.

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 2016, 4061, 164–172.