Gurung, Geeta, Archana Amatya, Nupur Thakur, and Ashma Rana. 2008. “Placental Site Trophoblastic Tumor With Perimetrial Invasion and Cesarean Scar Perforation (A Case Report)”. Nepal Journal of Obstetrics and Gynaecology 3 (1):55-57. https://nepjol.info/index.php/NJOG/article/view/1443.