Khajehei, M., K. Abdali, and H. Tabatabaee. “The Effect of Mefenamic Acid and Naproxen on Heavy Menstrual Bleeding: A Placebo-Controlled Study”. South African Journal of Obstetrics and Gynaecology, vol. 19, no. 2, May 2013, pp. 31-34, doi:10.7196/sajog.587.