1. Efficacy of external cephalic version: a review;Zhang;Obstet Gynecol,1993
2. The gentle art of external cephalic version;Ranney;Am J Obstet Gynecol,1973
3. Management of breech presentation;American College of Obstetricians and Gynecologists,1986
4. Maternal and fetal factors affecting success of antepartum external cephalic version;Ferguson;Obstet Gynecol,1987
5. Antepartum external cephalic version under tocolysis;Dyson;Obstet Gynecol,1986