Pygathrix cinerea

Groves, C. P. 2001. Primate taxonomy. Smithsonian Institution Press, Washington, DC, USA.

Ha Thanh Long. 2004. Distribution and status of grey-shanked douc langur (Pygthrix cinerea) in Vietnam. In: T. Nadler, U. Streicher and Ha Thang Long (eds), Conservation of primates in Vietnam, pp. 52-57. Frankfurt Zoological Society, Hanoi, Vietnam.

Lippold, L. and Vu Ngoc Thanh. 1995. Douc langur variety in the central highlands of Vietnam. Asian Primates 5(1-2): 6?8.

Lippold, L. and Vu Ngoc Thanh. 1999. Distribution of the grey-shanked douc langur in Vietnam. Asian Primates 7(1-2): 1-3.

Lippold, L. and Vu Ngoc Thanh. 2002. The grey-shanked douc: survey results from Tien Phuoc, Quang Nam, Viet Nam. Asian Primates 8(1-2): 3-6.

Nadler, T. 1995. Douc langur Pygathrix nemaeus ssp. and Francois? langur Trachypithecus francoisi ssp. with questionable taxonomic status in the Endangered Primate Rescue Center, Vietnam. Asian Primates 5(1-2): 1, 8-10.

Nadler, T. 1997. A new subspecies of Douc langur, Pygathrix nemaeus cinereus ssp. nov. Zoologische Garten 4: 165-176.

Nadler, T., Momberg, F., Nguyen, X., Dang and Lormee, N. 2003. Leaf monkeys: Vietnam Primate Conservation Status Review 2002 part 2.

Roos, C. and Nadler, T. 2001. Molecular evolution of the Douc Langurs. Zoologische Garten 71(1): 1-6.