L. L. Heston and James Shields, Homosexuality in Twins, Archives of General Psychiatry 18: 140—160 (1968).
160
Роль гомосексуалов в обществах охотников-собирателей и развитых обществах описывается в статьях James D.Weinrich Human reproductive strategy (Ph. D. thesis, Harvard University, 1976); Non-Reproduction and Intelligence: An Apparent Fact and One Sociobiological Explanation, Journal of Homosexuality; R. Reiche and M. Dannecker, Male Homosexuality in West Germany — a Sociological Investigation, Journal of Sex Research 13(1): 35-53 (1977).
