Grehan; Schwartz (2009). "Evolution of the second orangutan: phylogeny and biogeography of hominid origins". Journal of Biogeography. 36 (10): 1823–1844. doi:10.1111/j.1365-2699.2009.02141.x.
handle.net
hdl.handle.net
Schwartz, J.H.; Vu The Long; Nguyen Lan Cuong; Le Trung Kha; Tattersall, I (1995). "A review of the Pleistocene hominoid fauna of the Socialist Republic of Vietnam (excluding Hylobatidae)". Anthropological Papers of the American Museum of Natural History (76): 1–24. hdl:2246/259.
