1. Perineal tears;Kettle,1999
2. A randomised controlled trial of care of the perineum during second stage of normal labour;McCandlish;Br J Obstet Gynaecol,1998
3. Perineal care;Kettle;Clin Evid,1999
4. Relationship of episiotomy to perineal trauma and morbidity, sexual function and pelvic floor relaxation;Klein;Am J Obstet Gynaecol,1994
5. Episiotomy for vaginal birth (Cochrane Review);Carroli,1999