http://www.cancer.org/docroot/cri/content/cri_2_6x_can_having_an_abortion_cause_or_contribute_to_breast_cancer.asp

www.cspinet.org/new/200206251.html

Campbell, T., Colin, Campbell, Thomas M. II, Robbins, John and Lyman Howard, 2006. The China Study: The Most Comprehensive Study of Nutrition Ever Conducted and the Startling Implications for Diet, Weight Loss and Long-term Health, Benbella Books.