1. Intrapartum care: management and delivery of care to women in labour;National Institute for Clinical Excellence,2007
2. Active management of labor as an alternative to cesarean section for dystocia;O'Driscoll;Obstet Gynecol,1984
3. Vaginal delivery from the persistent occiput posterior position. Influence on maternal and neonatal morbidity;Pearl;J Reprod Med,1993
4. Occipitoposterior position: associated factors and obstetric outcome in nulliparas;Sizer;Obstet Gynecol,2000
5. Influence of persistent occiput posterior position on delivery outcome;Fitzpatrick;Obstet Gynecol,2001