http://www.iqcomparisonsite.com/sexdifferences.aspx
http://www.randalolson.com/2014/06/25/average-iq-of-students-by-college-major-and-gender-ratio/
http://www.sueddeutsche.de/panorama/neue-studie-also-doch-maenner-sind-intelligenter-als-frauen-1.859443
https://www.psychologytoday.com/blog/brain-myths/201207/two-myths-and-three-facts-about-the-differences-in-men-and-womens-brains
