A.  Gonzalez-Megias and Sanchez-Pinero, F., ?Effects of brood parasitism on host reproductive success: evidence from larval interactions among dung beetles?, Oecologia, vol. 134, pp. 195-202, 2003.

C. A.  Medina, Toro, A. Lopera, Vitolo, A., and Gill, B., ?Escarabajos coprofagos (Coleoptera: Scarabaeidae: Scarabaeinae) de Colombia?, Biota Colombiana, vol. 2, pp. 131-144, 2001.