Thapa, Meena, Rachana Saha, Amita Pradhan, and Sweety Shrestha. 2008. “Effectiveness of Drotaverine Hydrochloride in Progression of Labour”. Nepal Journal of Obstetrics and Gynaecology 2 (2):9-11. https://www.nepjol.info/index.php/NJOG/article/view/1447.