1. Chapitre 4 – Accouchement normal en présentation du sommet;Lansac,2011
2. Persistent occiput posterior presentation-a clinical problem;Gardberg;Acta Obstet Gynecol Scand,1994
3. Occipitoposterior position: associated factors and obstetric outcome in nulliparas;Sizer;Obstet Gynecol,2000
4. Influence of persistent occiput posterior position on delivery outcome;Fitzpatrick;Obstet Gynecol,2001
5. Persistent fetal occiput posterior position: obstetric outcomes;Ponkey;Obstet Gynecol,2003