Review

Shoulder dystocia: guidelines for clinical practice from the French College of Gynecologists and Obstetricians (CNGOF).

Eur. J. Obstet. Gynecol. Reprod. Biol. 2016 Aug 1; 203: 156-61.
Article

Does epidural analgesia prolong labor and increase risk of cesarean delivery? A natural experiment.

Am. J. Obstet. Gynecol. 2001 Jul 1;185(1):128-34.
Comparative Study

Epidural analgesia and cesarean section for dystocia: risk factors in nulliparas.

Am J Perinatol. 1991 Nov 1;8(6):402-10.