Verma, D. P., D. C. Pandya, D. V. Ramanuj, and D. M. Singh. “Menstrual Pattern of Adolescent School Girls of Bhavnagar (Gujarat): Menstrual Pattern Of Adolescent School Girls”. National Journal of Integrated Research in Medicine, vol. 2, no. 1, Mar. 2011, pp. 39-41, http://www.nicpd.ac.in/ojs-/index.php/njirm/article/view/1895.