1. The management of cervical incompetence by purse string suture;Cushner;Am J Obstet Gynecol,1963
2. Comparison of success and morbidity in cervical cerclage procedures;Harger;Obstet Gynecol,1980
3. A new surgical procedure for the correction of the incompetent cervix during pregnancy, the Wurm's procedure;Hefner;Obstet Gynecol,1961
4. Prophylactic and therapeutic operations performed in the clinic for obstetrics and gynaecology Mannheim between the year 1965 and 1973;Honlweg Majirt;Geburtsh Frauenheilk,1974
5. Treatment of the incompetent cervix;Laurensen;Acta Obstet Gynecol Scand,1973