• Bach, L. T. & Rawson, B. M. (2011): Population assessment of the northern white-cheeked crested gibbon (Nomascus leucogenys) in Pu Mat National Park, Nghe An province. Hanoi: Conservation International and Fauna & Flora International.
  • Cheyne, S. M., Campbell, C. O. & Payne, K. L. (2012): Proposed guidelines for in situ gibbon rescue, rehabilitation and reintroduction. International Zoo Yearbook 46 : 265281.
  • Geissmann, T. (2008): Auf der Suche nach Chinas letzten Weisshandgibbons: Ein Projektbericht aus dem Nangunhe-Naturreservat in der provinz Yunnan. Gibbon Conservation Alliance, Jahresbericht 4 : 1021. [German text, English summary.]
  • IUCN (2011): IUCN red list of threatened species (version 2011.2). Gland, Switzerland, and Cambridge, UK: IUCN. (accessed 18 December 2011).
  • Kenyon, M., Cronin, A., Jai-Chyi Pei, K. & Van Thanh, T. (2012): The role of sanctuaries in integrated conservation: the Endangered Asian Species Trust linking Monkey World – Ape Rescue, UK and Pingtung Rescue Centre, Taiwan, with the Dao Tien Endangered Primate Species Centre in Vietnam. International Zoo Yearbook 46 : 252258.
  • Melfi, V. A. (2012): Ex situ gibbon conservation: status, management and birth sex ratios. International Zoo Yearbook 46 : 241251.
  • Mootnick, A. R., Chan, B. P. L., Moisson, P. & Nadler, T. (2012): The status of the Hainan gibbon Nomascus hainanus and the Eastern black gibbon Nomascus nasutus. International Zoo Yearbook 46 : 259264.
  • Thinh, V. N., Mootnick, A. R., Thanh, V. N., Nadler, T. & Roos, C. (2010): A new species of crested gibbon, from the central Annamite mountain range. Vietnamese Journal of Primatology 1(4): 112.