Sherpa, S. Z., M. Sheilini, and A. Nayak. “Knowledge, Attitude, Practice and Preferences of Contraceptive Methods in Udupi District, Karnataka.”. Journal of Family and Reproductive Health, Vol. 7, no. 3, 1, pp. 115-20, https://jfrh.tums.ac.ir/index.php/jfrh/article/view/272.