Ashoka, Ankita, and Lata Radhakrishna Kollur. “An Observational Study on Premenstrual Symptoms and Dysmenorrhea Among Nursing Students”. National Journal of Community Medicine, vol. 6, no. 04, Dec. 2015, pp. 597-00, https://www.njcmindia.com/index.php/file/article/view/1287.