1. The seventy-five per cent rule for subspecies;Amadon;Condor,1949
2. American Association of Anthropologists statement on race;American Anthropologist,1998
3. Mainstream science on intelligence;Arvey;The Wall Street Journal,1994
4. Principles of genealogical concordance in species concepts and biological taxonomy;Avise;Oxford Surveys in Evolutionary Biology,1990
5. Phylogeography;Avise,2000