I. Martinez M. and R., M. Cruz, ?Effects of nourishment on the gonadal maturation in Canthon cyanellus cyanellus LeConte (Coleoptera: Scarabaeidae: Scarabaeinae)?, The Coleopterists Bulletin, vol. 52, pp. 237-243, 1998.

I. Martinez M. and R., M. Cruz, ?The effects of male glandular secretions on female endocrine centers in Canthon cyanellus cyanellus LeConte (Coleoptera: Scarabaeidae: Scarabaeinae)?, The Coleopterists Bulletin, vol. 53, pp. 208-216, 1999.

I. Martinez M. and R., M. Cruz, ?Comparative morphological analysis of testis follicles in dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae, Aphodiinae, Geotrupinae)?, Proceedings of the Entomological Society of Washington, vol. 101, pp. 804-815, 1999.

I. Martinez M., Lumaret, J. - P., and R., M. Cruz, ?Suspected side effects of a herbicide on dung beetle populations (Coleoptera : Scarabaeidae)?, Comptes Rendus De L Academie Des Sciences Serie Iii-Sciences De La Vie-Life Sciences, vol. 324, pp. 989-994, 2001.