Aryal, S., B. Thapa, and S. B. Pant. “Premenstrual Syndrome and Premenstrual Dysphoric Disorder in Medical and Nursing Students of a Tertiary Care Teaching Hospital in Nepal”. Nepal Journal of Obstetrics and Gynaecology, vol. 12, no. 1, Jan. 2018, pp. 12-16, https://nepjol.info/index.php/NJOG/article/view/18975.