Singla, A., G. Yadav, and S. Shree. “Combined Oral Contraceptives & Cerebral Venous Sinus Thrombosis: 2 Cases and Review”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 4, no. 1, Feb. 2017, pp. 269-71, https://www.ijrcog.org/index.php/ijrcog/article/view/1852.