Raveendran, Resmy C., Anju Mariam Jacob, and Jisha Ismail. 2016. “A Delve into the Menstrual Problems in Teenagers: A Cross Sectional Study in an Urban School in Kerala, India”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 5 (11):3978-82. https://doi.org/10.18203/2320-1770.ijrcog20163874.