1. Parental investment by sex on Ifaluk;Betzig;Ethology and Sociobiology,1986
2. Inequalities in Health;Black,1980
3. The mortality of the Gipsies in the county Szabolcs-Szatmár;Bodnár;Demografia,1980
4. Parental investment, social subordination and population processes among the 15th and 16th century Portugese nobility;Boone,1988
5. Sex, Evolution, and Behavior;Daly,1983