Ahsan, M.F. (2001) Socio-ecology of the hoolock gibbon (Hylobates hoolock) in two forests of Bangladesh. In The Apes: Challenges for the 21st Century, pp. 286–299. Chicago Zoological Society, Brookfield, USA.
Alfred, J.R.B. & Sati, J.P. (1990) Survey and census of the hoolock gibbon in West Garo Hills, Northeast India. Primates, 31, 299–106.
Alfred, J.R.B. & Sati, J.P. (1994) Diet and feeding in the hoolock gibbon of Garo Hills in North-eastern India. Annals of Forestry, 2, 109–122.
Altmann, J. (1974) Observational study of behavior: sampling methods. Behaviour, 49, 227–267.
Bartlett, T. (1999) The gibbons. In The Nonhuman Primates (eds Dohlinow, P. & Fuentes, A.), pp. 44–49. Mayfield Publishing Company, Mountain View, USA.
Brockelman, W. & Geissmann, T. (2008) Hoolock leuconedys. In IUCN Red List of Threatened Species v. 2012.1. Http://www.iucnredlist.org [accessed 6 July 2012].
Brockelman, W.Y., Naing, H., Saw, C., Moe, A., Linn, Z., Moe, T.K. & Win, Z. (2009) Census of eastern hoolock gibbons (Hoolock leuconedys) in Mahamyaing Wildlife Sanctuary, Sagaing Division, Myanmar. In The Gibbons: New Perspectives on Small Ape Socioecology and Population Biology (eds Lappan, S. & Whittaker, D.J.), pp. 435–452. Springer, New York, USA.
Champion, H.G. & Seth, S.K. (1968) Revised Survey of Forest Types of India. Government of India Press, New Delhi, India.
Chetry, D., Chetry, R., Das, A., Loma, C. & Panor, J. (2008) New distribution records for Hoolock leuconedys in India. Primate Conservation, 23, 125–128.
Chetry, D., Chetry, R., Ghosh, K. & Singh, A.K. (2010) Status and distribution of the eastern hoolock gibbon (Hoolock leuconedys) in Mehao Wildlife Sanctuary, Arunachal Pradesh, India. Primate Conservation, 25, 87–94.
Chetry, R. & Chetry, D. (2010) First record of eastern hoolock gibbon in Assam, India. Primate Conservation, 25, 95–97.
Chivers, D.J. (1974) The siamang in Malayasia: a field study of a primate in tropical rain forests. Contributions to Primatology, 4, 1–335.
Chivers, D.J. (1984) Feeding and ranging in gibbons: a summary. In The Lesser Apes: Evolutionary and Behavioural Biology (eds Preuschoft, H., Chivers, D.J., Brockelman, W.Y. & Creel, N.), pp. 267–281. Edinburgh University Press, Edinburgh, UK.
Das, J., Biswas, J., Bhattacharjee, P.C. & Mohnot, S.M. (2006) First distribution records of the eastern hoolock gibbon (Hoolock hoolock leuconedys) from India. Zoos' Print Journal, 21, 2316–2320.
Das, J., Feeroz, M.M., Islam, M.A., Biswas, J., Bujarborua, P., Chetry, D.
et al. (2003) Distribution of hoolock gibbon (Bunopithecus hoolock hoolock) in India and Bangladesh. Zoos’ Print Journal, 18, 969–976.
Fan, F.P., Wen, X., Sheng, H., Sen, A.H., Can, W.T. & Tao, L.R. (2011) Distribution and conservation status of the Vulnerable eastern hoolock gibbon Hoolock leuconedys in China. Oryx, 45, 129–134.
Fan, P.F. & Jiang, X.L. (2007) Population viability analysis for black crested gibbon (Nomascus concolor jingdongensis) in Dazhaizi at Mt Wuliang, Yunnan, China. Acta Ecologica Sinica, 27, 620–626.
Geissmann, T. (2007) Status reassessment of the gibbons: results of the Asian Primate Red List workshop 2006. Gibbon Journal, 3, 5–15.
Gittins, S.P. & Tilson, R.L. (1984) Notes on the ecology and behavior of the hoolock gibbon. In The Lesser Apes: Evolutionary and Behavioral Biology (eds Preuschoft, H., Chivers, D.J., Brockelman, W.Y. & Creel, N.), pp. 258–266. Edinburgh University Press, Edinburgh, UK.
Groves, C.P. (1971) Geographic and individual variation in Bornean gibbons, with remarks on the systematics of the subgenus Hylobates
. Folia Primatologica, 14, 139–53.
Groves, C.P. (1972) Systematics and phylogeny of gibbons. In Gibbon and Siamang (ed. Rumbaugh, D.M.), pp. 1–89. Karger, Basel, Switzerland.
Gupta, A.K., Sharma, N., Dasgupta, S., Chakraborty, D. & Hazarika, R. (2005) Conservation of hoolock gibbon (Bunopithecus hoolock) in northeast India. ENVIS Bulletin: Wildlife and Protected Areas, 8–252.
Harlan, R. (1934) Description of a species of Orang from the North-eastern Province of British East India, lately the Kingdom of Assam. Trans American Philosophical Society, 4, 52–59.
Islam, M.A. & Feeroz, M.M. (1992) Ecology of hoolock gibbon of Bangladesh. Primates, 33, 451–464.
Jiang, X.L., Luo, Z.H., Zhao, S.Y., Li, R.Z. & Liu, C.M. (2006) Status and distribution pattern of black crested gibbon (Nomascus concolor jingdongensis) in Wuliang Mountains, Yunnan, China: implication for conservation. Primates, 47, 264–271.
Kakati, K. (1997) Food selection and ranging in the hoolock gibbon (Hylobates hoolock) in Borajan Reserve Forest, Assam. MSc thesis. Wildlife Institute of India, Dehradun, India.
Kakati, K., Raghavan, R., Chellam, R., Qureshi, Q. & Chivers, D.J. (2009) Status of western hoolock gibbon (Hoolock hoolock) populations in fragmented forests of eastern Assam. Primate Conservation, 24, 127–137.
Kaul, R.N. & Haridasan, K. (1987) Forest types of Arunachal Pradesh—a preliminary study. Journal of Economic & Taxonomic Botany, 9, 379–389.
Kumar, A., Marcot, B.G. & Saxena, A. (2006) Tree species diversity and distribution patterns in tropical forests of Garo Hills. Current Science, 91, 1–12.
Kushwaha, S.P.S., Ramakrishnan, P.S. & Tripathi, R.S. (1981) Population dynamics of Eupatorium odoratum in successional environments following slash and burn agriculture. Journal of Applied Ecology, 18, 529–536.
Lwin, N., Geissmann, T., Aung, S.S., Aung, T.N., Aung, Z.M., Hla, T.H.
et al. (2011) The Myanmar hoolock gibbon conservation status review: first results. Gibbon Journal, 6, 13–17.
Moir, R.J. (1994) The carnivorous herbivores. In The Digestive System in Mammals: Food, Form and Function (eds Chivers, D.J. & Langer, P.), pp. 87–102. Cambridge University Press, Cambridge, UK.
Mootnick, A. & Groves, C.P. (2005) A new generic name for the hoolock gibbon (Hylobatidae). International Journal of Primatology, 26, 972–976.
Mukherjee, R.P. (1986) The ecology of the hoolock gibbon, Hylobates hoolock, in Tripura, India. Journal of the Zoological Society of India, 34, 70–81.
Panor, J. (2011) Outings with hoolock of Delo. Zoos' Print Journal, 12, 19–20.
QGIS (2012) A free and open-source geographic information system. Http://www.qgis.org [accessed September 2013].
Struhsaker, T.T. (1975) The Red Colobus Monkey. University of Chicago Press, Chicago, USA.
Sykes, J.M. & Horrill, A.D. (1977) Vegetation Monitoring in Indian Tiger Reserves. A report to WWF. Merlwood Research Station, Grange-over-Sands, UK.
Tilson, R.I. (1979) Behavior of hoolock gibbon (Hylobates hoolock) during different seasons in Assam, India. Journal of Bombay Natural History Society, 76, 1–16.
Walker, S., Molur, S., Brockelman, W.Y., Das, J., Islam, A., Geissmann, T. & Fan, P.F. (2009) Western hoolock gibbon Hoolock hoolock (Harlan, 1831). In Primates in Peril: The World's 25 Most Endangered Primates 2008–2010 (eds Mittermeier, R.A., Wallis, J., Rylands, A.B., Ganzhorn, J.U., Oates, J.F., Williamson, E.A.
et al. ), pp. 62–64. IUCN/Species Survival Commission Primate Specialist Group, International Primatological Society, and Conservation International, Arlington, USA.
Wilson, C.C. & Wilson, W.L. (1975) The influence of selective logging on primates and some other animals in East Kalimantan. Folia Primatologica, 23, 245–274.