1. Intrapartum management of twin gestation;Chervenak;Obstet Gynecol,1985
2. Management of the breech second twin;Kelsick;Am J Obstet Gynecol,1982
3. Multiple gestation;American College of Obstetricians and Gynecologists,1989
4. Delivery of the second twin;Acker;Obstet Gynecol,1982
5. Vaginal delivery of the second twin in breech presentation;Blickstein;Obstet Gynecol,1987