Burton, G.J. (1981). "The Relationship Between Body and Gonadal Weights of the Dusky Leaf Monkey (Presbytis obscura)". International Journal of Primatology. 2 (4): 351–368. doi:10.1007/BF02693484. S2CID42972066.
Burton, G.J. (1981). "The Relationship Between Body and Gonadal Weights of the Dusky Leaf Monkey (Presbytis obscura)". International Journal of Primatology. 2 (4): 351–368. doi:10.1007/BF02693484. S2CID42972066.
Ruslin, Farhani; Matsuda, Ikki; Md-Zain, Badrul Munir (2019-01-01). "The feeding ecology and dietary overlap in two sympatric primate species, the long-tailed macaque (Macaca fascicularis) and dusky langur (Trachypithecus obscurus obscurus), in Malaysia". Primates. 60 (1): 41–50. doi:10.1007/s10329-018-00705-w. ISSN1610-7365. PMID30564972. S2CID56170185.
Napier, John Russell; Napier, P. H. (1967). A handbook of living primates: morphology, ecology and behaviour of nonhuman primates. London: Academic. ISBN0-12-513850-4. OCLC255860.
Thongnetr, Weera; Sangpakdee, Wiwat; Tanomtong, Alongklod; Nie, Wenhui; Raso, Sayam; Pinthong, Krit (2021-11-27). "The chromosomal homology between dusky langur (Trachypithecus obscurus Ried, 1837) and human (Homo sapiens) revealed by chromosome painting". The Nucleus. 65 (2): 233–237. doi:10.1007/s13237-021-00381-0. ISSN0976-7975. S2CID244740122.
Don E. Wilson; DeeAnn M. Reeder (2005). Mammal species of the world: a taxonomic and geographic reference (3rd ed.). Baltimore: Johns Hopkins University Press. ISBN0-8018-8221-4. OCLC57557352.
G. Gene Montgomery (1978). The ecology of arboreal folivores: a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975. Washington, D.C.: Smithsonian Institution Press. ISBN0-87474-646-9. OCLC4004986.