Sandberg, EC (June 15, 1985). "The Zavanelli maneuver: a potentially revolutionary method for the resolution of shoulder dystocia". American Journal of Obstetrics and Gynecology. 152 (4): 479–84. doi:10.1016/s0002-9378(85)80161-7. PMID4014342.
Sandberg, EC (June 15, 1985). "The Zavanelli maneuver: a potentially revolutionary method for the resolution of shoulder dystocia". American Journal of Obstetrics and Gynecology. 152 (4): 479–84. doi:10.1016/s0002-9378(85)80161-7. PMID4014342.