Nowak, R.M. (1991) Walker's Mammals of the World.The Johns Hopkins University Press, Baltimore and London.
Ankel-Simons, F. (2000) Primate Anatomy: an Introduction.Academic Press, San Diego, California.
Marshall Cavendish Corporation. (2001) Endangered Wildlife and Plants of the World.Marshall Cavendish Corporation, New York.
Mittermeir, R.A., Tattersall, I., Konstant, R., Meyers, D.M. and Mast, R.B. (1994) Conservation International Tropical Field Guide Series: Lemurs of Madagascar.Conservation International, Washington DC.