1. Zur Casuistik der Ovarialschwangerschaft;Spiegelberg;Arch. Gynaekol,1878
2. Ovarian pregnancy;Gerin-Lajoie;Am. J. Obstet. Gynecol,1951
3. Corpus luteum surgery;Hibbard;Am. J. Obstet. Gynecol,1979
4. Ectopic pregnancy;Lund;J. Obstet. Gynaecol. Br. Emp,1955
5. Is the IUD increasing the number of ovarian pregnancies?;McMorries;Contemp. Ob/GYN,1979