For further information on the white-collared brown lemur see:
Garbutt, N. (1999) Mammals of Madagascar. Pica Press, Sussex.
Mittermeier, R.A., Tattersall, I., Konstant, W.R., Meyers, D.M., and Mast, R.B. (1994) Lemurs of Madagascar. Conservation International, Washington, D.C.
Primates in Peril: The World's 25 Most Endangered Primates 2004 – 2006:
http://portals.conservation.org/downloads/storedfile/Document/top252004final.pdf