Varghese, J., V. Koothan, and V. Sujaritha. “Study of the Magnitude of Premenstrual Syndrome in a Tertiary Care Institute in Pondicherry, India”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 8, no. 6, May 2019, pp. 2188-92, doi:10.18203/2320-1770.ijrcog20192130.