1. Spinal (subarachnoid) neural blockade;Bridenbaugh,1988
2. Spinal (lumbar) epidural block. Principles and practice of obstetric analgesia and anesthesia;Bonica,1969
3. Lumbar epidural anesthesia;Albright,1986
4. The obese parturient;Dewan,1988
5. Effect of the left lateral recumbent position compared with the supine and upright positions on placental blood flow in normal late pregnancy;Suonio;Ann Clin Res,1976