1. Brandon-Jones, D., Eudey, A. A., Geissmann, T., Groves, C. P., Melnick, D. J., Morales, J. C., Shekelle, M., and Stewart, C.-B. (2004). Asian Primate classification. Int. J. Primatol. 25: 97–164.
2. Colbert, E. H., and Hooijer, D. A. (1953). Pleistocene mammals from the limestone fissures of Szechuan, China. Bull. Amer. Mus. nat. Hist. 102: 1–134.
3. Elliot, D. G. (1913). Review of the Primates. New York: AMNH Publications.
4. Frisch, J. E. (1965). Trends in the Evolution of the Hominoid dentition. Bibliotheca Primatologica, 3. Basel: S. Karger.
5. Geissmann, T. (2002). Taxonomy and evolution of gibbons. Evol. Anthrop. Suppl. 1: 28–31.