Bhattacharya, P., N. Kapoor, A. Kyal, and P. Mukhopadhyay. “A Comparative Study of Drospirenone and Desogestrel: An Overview of Benefi Ts and Side Effects”. Nepal Journal of Obstetrics and Gynaecology, vol. 6, no. 1, Aug. 2011, pp. 17-21, https://nepjol.info./index.php/NJOG/article/view/5247.