Lovejoy C O, Burstein A H, Heiple K G
Science. 1972 May 19;176(4036):803-5. doi: 10.1126/science.176.4036.803.
Recalculation of the time of divergence of the Pongidae and Hominidae after correction of immunological distance by inclusion of generation length yields minimum dates of approximately 14 million years ago.