1. Unruptured interstitial pregnancy;Keenan;Am J Surg,1944
2. Homolateral interstitial pregnancy following salpingectomy;Buerguer;Western J Surg,1948
3. Interstitial pregnancy following tubal pregnancy: report of a case;Speck;Obstet Gynecol,1956
4. Interstitial pregnancy ruptured through tubal stump;D'Errico;New Engl Med,1937
5. Interstitial pregnancy;Mcleman;Canad Med J,1950