Shaikh, S., A. Shaikh, S. Shaikh, and B. Isran. “Frequency of Obstructed Labor in Teenage Pregnancy”. Nepal Journal of Obstetrics and Gynaecology, vol. 7, no. 1, Oct. 2013, pp. 37-40, https://nepjol.info./index.php/NJOG/article/view/8834.