Frommer, Gabriel. "Mendel's Experiments." Introductory Psychology I, Indiana University, n.d.
"Mendelian Genetics." Genetics Generation, n.d.
Sivakumaran S., et al. "Abundant Pleiotropy in Human Complex Diseases and Traits." American Journal of Human Genetics, vol. 89, no. 5. 2011, pp. 607–18.