1. Local anesthetics potentiate spinal morphine antinociception;Åkerman;Anesth. Analg.,1988
2. The ideal epidural bupivacaine concentration for postoperative analgesia;Burgess;Anesthesiology,1993
3. Editorial II;Calvey;Br. J. Anaesth.,1993
4. Epidural patients-controlled analgesia after cesarean section;Cohen;Anesth. Analg.,1992
5. Statistical methods in biological assay;Finney,1978