Choudhary, D., A. Nigam, R. Yadav, S. Choudhary, and C. Raghunandan. “Placenta Accreta: Obstetrician’s Nightmare; A Case Series of Seven Patients”. Nepal Journal of Obstetrics and Gynaecology, vol. 7, no. 1, Oct. 2013, pp. 56-58, https://www.nepjol.info/index.php/NJOG/article/view/8839.