Lan Anh, N. T., Dang, N. X., Huan, N. X., & Duc, N. A. (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), 179–188. https://doi.org/10.15625/0866-7160/v36n2.5116