1. Ahsan MF (1994) Feeding ecology of the primates of Bangladesh. In: Thierry B, Anderson RJ, Roeder JJ, Herrenschmidt N (eds) Current primatology. vol. Ecology and evolution. University of Louis Pasteur, Strasbourg, pp 79–86
2. Altmann J (1974) Observational study of behavior: sampling methods. Behaviour 49:227–262
3. Bennett EL, Davies AG (1994) The ecology of Asian colobines. In: Davies AG, Oates JF (eds) Colobine monkeys: their ecology, behavior and evolution. Cambridge University Press, Cambridge, pp 129–171
4. Britt A, Randriamandratonirina NJ, Glasscock KD, Iambana BR (2002) Diet and feeding behaviour of Indri indri in a low-altitude rain forest. Folia Primatol 73:225–239
5. Chalise MK (2003) Assamese macaques (Macaca assamensis) in Nepal. Primate Conserv 19:99–107