1. Biología Centrali-Americana;Bates;Coleoptera,1887
2. Branch support and tree stability;Bremer;Cladistics,1994
3. Dung beetles (Scarabaeidae: Scarabaeinae) attracted to Woolly monkey (Lagothrix Lagothricha Humboldt) dung at Tinigua National Park, Colombia;Castellanos;The Coleopterists Bulletin,1999
4. Comparative morphology of the male genitalia of derived groups of Scarabaeoidea (Coleoptera);D'Hotman;Elytron,1990
5. Díaz , R. A. 1997 Universidad Nacional Autónoma de México, Facultad de Ciencias, Tesis de Maestría 174