1. Anderson, J., Cowlishaw, G., & Rowcliffe, J. M. (2007). Effects of forest fragmentation on the abundance of Colobus angolensis palliatus in Kenya’s Coastal Forests. International Journal of Primatology, 28, 637–655.
2. Auta, J., & Anwa, E. P. (2007). Preliminary studies on Albizzia lebbeck seeds: Proximate analysis and phytochemical screening. Research Journal of Biological Sciences, 2, 33–35.
3. Benefit, B. R., & McCrossin, M. L. (1991) Ancestral facial morphology of Old World higher primates. Proceedings of the National Academy of Sciences United States of America, 88, 5267–5271.
4. Bennett, E. L. (1983). The banded langur: Ecology of a colobine in West Malaysian rain-forest. Ph.D. thesis, University of Cambridge, Cambridge.
5. Bennett, E. L., & Davies, A. G. (1994). The ecology of Asian colobines. In A. G. Davies & J. F. Oates (Eds.), Colobine monkeys: Their ecology, behaviour and evolution (pp. 129–171). Cambridge: Cambridge University Press.