Lan Anh, N.T. et al. 2014. Food choice of the tonkin snub-nosed monkey Rhinopithecus avunculus (Dollman, 1912) in Khau Ca species and habitat conservation, Ha Giang province. Academia Journal of Biology. 36, 2 (Oct. 2014), 179–188. DOI:https://doi.org/10.15625/0866-7160/v36n2.5116.