Karami, Manoochehr, and Ensiyeh Jenabi. “Placenta Previa After Prior Abortion: A Meta-Analysis”. Biomedical Research and Therapy 4, no. 07 (July 28, 2017): 1441-1450. Accessed January 22, 2025. http://bmrat.com/index.php/BMRAT/article/view/197.