Gokhman, V. E., & Westendorff, M. 2003: Chromosomes of Aphidius ervi Haliday, 1834 (Hymenoptera: Braconidae). - Beiträge Zur Entomologie = Contributions to Entomology 53(1): 161–165 - doi: 10.21248/contrib.entomol.53.1.161-165