http://www.abc.net.au/radionational/programs/rearvision/a-question-of-gender-the-sex-testing-of-female/4087112

Laura A Wackwitz, Verifying the myth: olympic sex testing and the category “woman”, Women's Studies International Forum, Volume 26, Issue 6, November–December 2003, Pages 553-560, ISSN 0277-5395, 10.1016/j.wsif.2003.09.009." The assumption that there are, and should be, two and only two forms of the human body—male and female."