1. Simons, E. L. Primate Evolution: an Introduction to Man's Place in Nature (Macmillan, New York, 1972)
2. Szalay, F. S. & Delson, E. Evolutionary History of the Primates (Academic, London, 1979)
3. Rose, K. D., Godinot, M. & Bown, T. M. in Anthropoid Origins (eds Fleagle, J. G. & Kay, R. F.) 1–28 (Plenum, New York, 1994)
4. Fleagle, J. G. Primate Adaptation and Evolution 2nd edn (Academic, London, 1999)
5. Bowen, G. J. et al. Mammalian dispersal at the Paleocene/Eocene boundary. Science 295, 2062–2065 (2002)