1. Diagnosis and treatment of advanced extra uterine pregnancy;Maas;S Afr Med J,1975
2. Advanced extra uterine pregnancy: description of 38 cases with literature survey;Ombelet;Obs Gynae Surv,1988
3. Abdominal pregnancy: current concepts of management;Martin;Obstet Gynecol,1988
4. Advanced abdominal pregnancy;Costa;Obs Gynae Surv,1991
5. Abdominal pregnancy in the United States: frequency and maternal mortality;Atrash;Obstet Gynecol,1987