1. Barrett , P. Gautrey , P. Herbert , S. Kohn , D. Smith , S. 1987 Charles Darwin's Notebooks 1836 1844 Cambridge University Press
2. Bowler , P. 2003 Evolution: The History of an Idea 3 rd Edition
3. Boyd , R. Richerson , P. 2000 Darwinizing Culture R. Aunger 143 162 Oxford University Press
4. Brandon , R. 1990 Adaptation and Environment Princeton University Press
5. Crow , J. Kimura , M. 1979 PNAS 76 396 399