Rasmussen, D. T.; Simons, Elwyn L. (1992). "Paleobiology of the oligopithecines, the earliest known anthropoid primates". International Journal of Primatology. 13 (5): 477–508. doi:10.1007/BF02547829. S2CID24355126.
Rasmussen, D. T.; Simons, Elwyn L. (1992). "Paleobiology of the oligopithecines, the earliest known anthropoid primates". International Journal of Primatology. 13 (5): 477–508. doi:10.1007/BF02547829. S2CID24355126.