1. Oral prostaglandin E2 for induction of labor at term;Friedman;Obstet. Gynecol,1974
2. Oral prostaglandin E2 for the induction of labor at term: II. Comparison of two low-dosage regimens;Friedman;Am. J. Obstet. Gynecol,1975
3. Uterine hypertonus during labour induced by prostaglandins;Roberts;Br. Med. J,1971
4. Induction of labor with oral prostaglandin E2;Laerson;Obstet. Gynecol,1974
5. Guidelines for the elective induction of labor with oral prostaglandin E2;Visscher;Obstet. Gynecol,1977