Adhikary, A., A. Begum, F. S. Joty, N. R. Sarker, and R. Sultana. “Maternal Risk Factors of Placenta Praevia and Its Effects on Maternal and Fetal Outcome”. Bangladesh Medical Journal, vol. 48, no. 2, May 2019, pp. 7-12, doi:10.3329/bmj.v48i2.51259.