1. Ahsan, M. F. (1994). Behavioural ecology of the Hoolock Gibbon in Bangladesh. [Unpublished doctoral dissertation]. University of Cambridge, Cambridge.
2. Ahsan, M. F. (2001). Socio-ecology of the hoolock gibbon (Hylobates hoolock) in two forests of Bangladesh. Brookfield Zoo, compiler. The apes: challenges for the 21st century: conference proceedings, May 10–13, 2000. Brookfield (IL): Brookfield Zoo, 286–299.
3. Ahsan, M. M., Aziz, N., Morshed, H. M. (2016). Assessment of Management Effectiveness of Protected Areas of Bangladesh. SRCWP Project; Bangladesh Forest Department: Dhaka, Bangladesh, 2016.
4. Alfred, J. R. B. (1992). The hoolock gibbon – Hylobates hoolock. Primate Report, 34, 65–69.
5. Alfred, J. R. B., & Sati, J. P. (1990). Survey and census of the hoolock gibbon in West Garo Hills, northeast India. Primates, 31, 299–306.