Barday-Karbanee, N., T. Siebert, M. Botha, and T. Kruger. “Diagnostic Features of Polycystic Ovary Syndrome”. South African Journal of Obstetrics and Gynaecology, vol. 12, no. 1, May 2006, pp. 30-35, https://www.ajol.info/index.php/sajog/article/view/34295.