H.  Yasuda, ?Fecundity of two dung beetle species, Onthophagus lenzii Harold and Liatongus phanaeoides Westwood (Coleoptera: Scarabaeidae)?, Japanese Journal of applied Entomology and Zoology, vol. 26, pp. 177-178, 1986.

H.  Yasuda, ?Differences in temporal utilization patterns of dung pats among three scarabaeid dung beetles?, Research in Population Ecology, vol. 29, pp. 167-177, 1987.

H.  Yasuda, ?Survival rates for two dung beetles species, Onthophagus lenzii Harold and Liatongus phanaeoides Westwood (Coleoptera: Scarabaeidae), in the field?, Applied Entomology and Zoology, vol. 26, pp. 449-456, 1991.