1. Woo, J. K., Dryopithecus teeth from Keiyuan, Yunnan Province, Vert PalAs, 1957, 1(1): 25–32.
2. Woo, J. K., New materials of Dryopithecus from Keiyuan, Yunnan, Vert PalAs, 1958, 2(1): 38–43.
3. Xu, Q. H., Lu, Q. W., Pan, Y. R. et al., The fossil mandible of Ramapithecus lufengensis, Kexue Tongbao, 1978, 23(9): 554–556.
4. Lu, Q. W., Xu, Q. H., Zheng, L., Preliminary research on the cranium of Sivapithecus yunnanensi, Vert PalAs, 1981, 19(2): 101–106.
5. Zhang, X. Y., Lin, Y. P., Jiang, C. et al., A new species of Ramapithecus from Yuanmou, Yunnan Province, Sixiangzhanxian, 1987, (3): 54–56.