Katiyar, Kalpana, et al. “KAP STUDY OF MENSTRUAL PROBLEMS IN ADOLESCENT FEMALES IN AN URBAN AREA OF MEERUT”. Indian Journal of Community Health, vol. 25, no. 3, Sept. 2013, pp. 217-20, http://iapsmupuk.org/journal/index.php/IJCH/article/view/317.