J.  Hortal, Lobo, J. M., and Martin-Piera, F., ?Forecasting insect species richness scores in poorly surveyed territories: the case of the Portuguese dung beetles (Col. Scarabaeinae)?, Biodiversity and Conservation, vol. 10, pp. 1343-1367, 2001.

J. M.  Lobo and Martin-Piera, F., ?Between-group differences in the Iberian dung beetle species-area relationship (Coleoptera : Scarabaeidae)?, Acta Oecologica-International Journal of Ecology, vol. 20, pp. 587-597, 1999.

J. M.  Lobo and Martin-Piera, F., ?Searching for a predictive model for species richness of Iberian dung beetle based on spatial and environmental variables?, Conservation Biology, vol. 16, pp. 158-173, 2002.

F.  Martin-Piera and Lobo, J. M., ?A comparative discussion of trophic preferences in dung beetle communities?, Miscellania Zoologica Barcelona, vol. 19, pp. 13-31, 1996.