Dixon, W.N. 2006. Gall Wasps, Callirhytis quercusclaviger (Ashmead) and Callirhytis cornigera (Osten Sacken) (Insecta: Hymenoptera: Cynipidae): EENY-368/IN664, 5/2006. EDIS. 2006, 10 (Jun. 2006). DOI:https://doi.org/10.32473/edis-in664-2006.