1. Episiotomy infection and dehiscence;Owen,1990
2. Midline episiotomy as a routine procedure;Beynon;J Obstet Gynaecol Br Commonw,1974
3. Morbidity in the third-degree laceration;Sieber;Obstet Gynecol,1962
4. A study of fourth degree perineal lacerations and their sequelae;Brantley;Am J Obstet Gynecol,1960
5. Third-and-fourth-degree perineal tears. 50 years' experience at a university hospital;Legino;J Reprod Med,1988