1. E. Andresen, 1994 . Frugivory and primary seed dispersal by spider monkeys(Ateles paniscus)and howler monkeys(Alouatta seniculus), and die fate of dispersed seeds at Manu National Park , Peru. M.S. thesis . Duke University, Durham, North Carolina.
2. A. Entwistle, and N. Dunstone, 2000 . The role of dung beetles in the regeneration of rainforest plants in Central Amazonia . Ph.D. dissertation . University of Florida, Gainesville, Florida.
3. Effects of dung presence, dung amount and secondary dispersal by dung beetles on the fate of Micropholis guyanensis (Sapotaceae) seeds in Central Amazonia