Saxena, S. C., Saxena, M., Singh, G., Singh, M., Ganguli, G., & Srivastava, J. P. (1995). A socio-medical study of morphological changes in endocervix with the use of oral contraceptives. Indian Journal of Community Health, 8(2,3), 15–18. Retrieved from http://www.iapsmupuk.org/journal/index.php/IJCH/article/view/26