Palacios-Jaraquemada, JM (April 2013). "Caesarean section in cases of placenta praevia and accreta". Best Practice & Research. Clinical Obstetrics & Gynaecology. 27 (2): 221–32. doi:10.1016/j.bpobgyn.2012.10.003. PMID23127895.
Handler, A; Kistin, N; Davis, F; Ferré, C (Apr 15, 1991). "Cocaine use during pregnancy: perinatal outcomes". American Journal of Epidemiology. 133 (8): 818–25. doi:10.1093/oxfordjournals.aje.a115961. PMID2021149.
Kistin, N; Handler, A; Davis, F; Ferre, C (July 1996). "Cocaine and cigarettes: a comparison of risks". Paediatric and Perinatal Epidemiology. 10 (3): 269–78. doi:10.1111/j.1365-3016.1996.tb00050.x. PMID8822770.
Aliyu, MH; Lynch, O; Nana, PN; Alio, AP; Wilson, RE; Marty, PJ; Zoorob, R; Salihu, HM (July 2011). "Alcohol consumption during pregnancy and risk of placental abruption and placenta previa". Maternal and Child Health Journal. 15 (5): 670–6. doi:10.1007/s10995-010-0615-6. PMID20437196. S2CID30696061.
Cotton, DB; Read, JA; Paul, RH; Quilligan, EJ (Jul 15, 1980). "The conservative aggressive management of placenta previa". American Journal of Obstetrics and Gynecology. 137 (6): 687–95. doi:10.1016/s0002-9378(15)33242-7. PMID7395932.
Oppenheimer, LW; Farine, D; Ritchie, JW; Lewinsky, RM; Telford, J; Fairbanks, LA (October 1991). "What is a low-lying placenta?". American Journal of Obstetrics and Gynecology. 165 (4 Pt 1): 1036–8. doi:10.1016/0002-9378(91)90465-4. PMID1951509.
Neale, E. J.; Rogers, M. S. (1 July 1989). "Vaginal ultrasound for ruling out placenta previa. Case report". BJOG: An International Journal of Obstetrics and Gynaecology. 96 (7): 881–2. doi:10.1111/j.1471-0528.1989.tb03334.x. PMID2669937. S2CID7724217.
Palacios-Jaraquemada, JM (April 2013). "Caesarean section in cases of placenta praevia and accreta". Best Practice & Research. Clinical Obstetrics & Gynaecology. 27 (2): 221–32. doi:10.1016/j.bpobgyn.2012.10.003. PMID23127895.
Handler, A; Kistin, N; Davis, F; Ferré, C (Apr 15, 1991). "Cocaine use during pregnancy: perinatal outcomes". American Journal of Epidemiology. 133 (8): 818–25. doi:10.1093/oxfordjournals.aje.a115961. PMID2021149.
Kistin, N; Handler, A; Davis, F; Ferre, C (July 1996). "Cocaine and cigarettes: a comparison of risks". Paediatric and Perinatal Epidemiology. 10 (3): 269–78. doi:10.1111/j.1365-3016.1996.tb00050.x. PMID8822770.
Aliyu, MH; Lynch, O; Nana, PN; Alio, AP; Wilson, RE; Marty, PJ; Zoorob, R; Salihu, HM (July 2011). "Alcohol consumption during pregnancy and risk of placental abruption and placenta previa". Maternal and Child Health Journal. 15 (5): 670–6. doi:10.1007/s10995-010-0615-6. PMID20437196. S2CID30696061.
Cotton, DB; Read, JA; Paul, RH; Quilligan, EJ (Jul 15, 1980). "The conservative aggressive management of placenta previa". American Journal of Obstetrics and Gynecology. 137 (6): 687–95. doi:10.1016/s0002-9378(15)33242-7. PMID7395932.
Oppenheimer, LW; Farine, D; Ritchie, JW; Lewinsky, RM; Telford, J; Fairbanks, LA (October 1991). "What is a low-lying placenta?". American Journal of Obstetrics and Gynecology. 165 (4 Pt 1): 1036–8. doi:10.1016/0002-9378(91)90465-4. PMID1951509.
Neale, E. J.; Rogers, M. S. (1 July 1989). "Vaginal ultrasound for ruling out placenta previa. Case report". BJOG: An International Journal of Obstetrics and Gynaecology. 96 (7): 881–2. doi:10.1111/j.1471-0528.1989.tb03334.x. PMID2669937. S2CID7724217.
Neale, E. J.; Rogers, M. S. (1 July 1989). "Vaginal ultrasound for ruling out placenta previa. Case report". BJOG: An International Journal of Obstetrics and Gynaecology. 96 (7): 881–2. doi:10.1111/j.1471-0528.1989.tb03334.x. PMID2669937. S2CID7724217.