J. M.  Lobo and de Oca, E. Montes, ?Spatial microdistribution of two introduced dung beetle species Digitonthophagus gazella (F.) and Euoniticellus intermedius (Reiche) (Coleoptera: Scarabaeidae) in an arid region of northern Mexico (Durango, Mexico)?, Acta Zoologica Mexicana (nueva serie), vol. 71, pp. 17-32, 1997.

I. Martinez M. and de Oca, E. Montes, ?Observaciones sobre algunos factores microambientales y el ciclo biologico de dos especies de escarabajos rodadores (Coleoptera, Scarabaeidae, Canthon)?, Folia Entomologica Mexicana, vol. 91, pp. 47-59, 1994.

E. Montes de Oca, ?Presence of the exotic dung beetle Euoniticellus intermedius (Reiche) (Coleoptera: Scarabaeidae) in Northern Mexico?, The Coleopterists Bulletin, vol. 48, p. 244, 1994.

E. Montes de Oca and Halffter, G., ?Invasion of Mexico by two dung beetles previously introduced into the United States?, Studies on Neotropical Fauna and Environment, vol. 33, pp. 37-45, 1998.