E.  Andresen, ?Seed dispersal by monkeys and the fate of dispersed seeds in a Peruvian rain forest?, Biotropica, vol. 31, pp. 145-158, 1999.

E.  Andresen, ?Effects of dung presence, dung amount and secondary dispersal by dung beetles on the fate of Micropholis guyanensis (Sapotaceae) seeds in Central Amazonia?, Journal of Tropical Ecology, vol. 17, pp. 61-78, 2001.

E.  Andresen, ?Dung beetles in a Central Amazonian rainforest and their ecological role as secondary seed dispersers?, Ecological Entomology, vol. 27, pp. 257-270, 2002.

E.  Andresen, ?Primary seed dispersal by red howler monkeys and the effect of defecation patterns on the fate of dispersed seeds?, Biotropica, vol. 34, pp. 261-272, 2002.