G.  Halffter, Favila, M. E., and Halffter, V., ?A comparative study of the structure of the scarab guild in Mexican tropical rain forests and derived ecosystems?, Folia Entomológica Mexicana, vol. 84, pp. 131-156, 1992.

J. Luis Navar Heredia and Miranda, N. E. Galindo, ?Escarabajos asociados a Basidiomycetes en San Jose de los Laureles, Morelos, Mexico (Coleoptera: Scarabaeidae)?, Folia Entomologica Mexicana, vol. 99, pp. 1-16, 1997.