Nemkov, P. G., and A. S. Lelej. “A Cladistic Analysis and Classification of the Subfamily Bembicinae (Hymenoptera: Crabronidae), With a Key to the Genera”. Zootaxa, vol. 3652, no. 2, May 2013, pp. 201–231, doi:10.11646/zootaxa.3652.2.1.