1. Reasons for the rising cesarean delivery rates: 1978-1984;Shiono;Obstet Gynecol,1987
2. EA Friedman 2nd ed. Labor: clinical evaluation and management 1978 Appleton-Century-Crofts New York
3. Influence of the duration of second stage labor on perinatal outcome and puerperal morbidity;Cohen;Obstet Gynecol,1977
4. WR Cohen EA Friedman DB Acker 2nd ed. Management of labor 1988 Aspen Publishers Rockville, Maryland
5. Oxytocin augmentation of dysfunctional labor. II. Uterine activity data;Seitchik;Am J Obstet Gynecol,1983