1. Birth-order effects on facets of extraversion;Beck;Personality and Individual Differences,2006
2. The birth-order controversy: Within-family effects and their generalizability;Chao,2001
3. Direct and indirect effects of birth order on personality and identity: Support for the null hypothesis;Dunkel;The Journal of Genetic Psychology,2009
4. Birth order: Its influence on personality;Ernst,1983
5. The nurture assumption: Why children turn out the way they do;Harris,1998