Notes
- 1 Mayr 1961, 1503
- 2 Dewsbury 1999, 189
- 3 Dewsbury 1999, 190
- 4 Mayr 1961, 1502
- 5 Tinbergen 1963, 419
- 6 Dewsbury1999, 191
- 7 Zeifman 2001, 265
- 8 Ibid.
- 9 Trevathan 2007, 140
- 10 Ness and Williams 1994, 7
- 11 UNAIDS
- 12 Weizmann Institute of Science
- 13 Lucotte 2002, 201
- 14 CDC
- 15 Hedrick and Verrelli 2006, 293-5
- 16 Galvani and Slatkin 2003, 15276-7
- 17 Sabeti 2008
- 18 World Health Organization 2007
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