References
- Loehlin , J. C. , Willerman , L. and Vandenberg , S. G. 1974 . Blood group and behavioral differences among dizygotic twins: A failure to replicate . Soc. Biol. , 21 : 205 – 206 .
- Pakstis , A. , Scarr‐Salapatek , S. , Elston , R. C. and Siervogel , R. 1972 . Genetic contributions to morphological and behavioral similarities among sibs and dizygotic twins: Linkages and allelic differences . Soc. Biol. , 19 : 185 – 192 .
- Pakstis , A. 1975 . Nature and uses of identity by descent analysis in the study of continuous phenotypes , Minneapolis , Minn : University of Minnesota . Ph.D. thesis,