1. Damario MA, Rock JA (2003) Ectopic Pregnancy. In: Rock JA, et al. (Eds.), Operative Gynecology (9th edn), Philadelphia: Lippincott Williams & Wilkins, USA, pp. 507-536.
2. Ectopic Pregnancy - Modern Diagnosis and Management;Kamrava;Maged Shendy & Rami Atalla (Eds ) Obstetrics and Gynecology USA,2011
3. Malinowski, Bates SK (2006) Semantics and pitfalls in the diagnosis of corneal/interstitial pregnancy. Fertil Steril 86(6): e11-e14.
4. Molinaro TA, Barnhart KT (2007) Ectopic pregnancy in unusual locations. Semin Reprod Med 25(2): 123-130.
5. Interstitial line: sonographic finding in interstitial (cornual) ectopic pregnancy;Ackerman;Radiology 189(1),1993