Mary-Claire King and Allan C. Wilson, Evolution at two levels in humans and chimpanzees, Science 188: 107—116 (1975).
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О способности шимпанзе овладевать языком см. David Premack, Language and Intelligence in Ape and Man, American Scientist 64(6): 674—683 (1976); Carl Sagan, The Dragons of Eden (Random House, New York, 1977).
