1. Ovarian apoplexy;Abel;Lancet,1964
2. Primary ovarian pregnancy. Report of three cases, one with implantation in an endometrial cyst of the ovary;Bercovici;Obstet. and Gynec.,1958
3. Intrafollicular ovarian pregnancy. Management with ovarian conservation;Dougherty;Obstet. and Gynec.,1969
4. Ovarian twin pregnancy. Report of a case;Green;Obstet. and Gynec.,1963
5. Detection of unsuspected ovarian pregnancy by wedge resection;Helde;Canad. med. Ass. J.,1972