Olmi, M., A. Guglielmino, and M. Vollaro. “Revision of Fossil Species of Dryinus belonging to constans Group, With Descrip-Tion of a New Species (Hymenoptera: Dryinidae)”. Zootaxa, vol. 2981, no. 1, Aug. 2011, pp. 43–55, doi:10.11646/zootaxa.2981.1.4.