1. Placenta previa and previous L.S.C.S.;Bender;Surg Gynecol Obstet,1954
2. Placenta praevia/accreta and prior caesarean section;Clark;Obstet Gynecol,1985
3. Aetiologic factors in placenta praevia. A case-controlled study;Rose;Br J Obstet Gynaecol,1986
4. Placenta accreta, increta and percreta. A survey of 40 cases;Breen;Obstet Gynecol,1977
5. Caesarean section: changing patterns in Saudi Arabia;Chattopadhyay;Int J Gynecol Obstet,1987