E.  Barbero and Palestrini, C., ?Ateuchus robustus (Harold, 1868) (Coleoptera: Scarabaeidae: Dichotomiina): descriziones del terzo stadio larvale e della pupa?, Giornale Italiano di Entomologia, vol. 6, pp. 187-193, 1992.

C.  DeLoya, ?Necrophilous Scarabaeidae and Trogidae beetles of tropical deciduous forest in Tepexco, Puebla, Mexico?, Acta Zoologica Mexicana (nueva serie), vol. 52, pp. 1-13, 1992.

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.