Baral, G., A. Vaidya, and S. Verma. “Hospital Based Clinical Protocol for the Management of Gestational Trophoblastic Disease at Maternity and Women’s Hospital”. Nepal Journal of Obstetrics and Gynaecology, vol. 5, no. 1, July 2011, pp. 61-67, https://nepjol.info./index.php/NJOG/article/view/5067.