1. William FG: Review of Medical Physiology, 18th ed. Nowalk, CT: Appleton & Lange, 1997:679–81.
2. Central sleep apnea;Thalhofer;Respiration,1997
3. Ventilatory responses to hypercapnia during tetracaine spinal anesthesia;Steinbrook;J Clin Anesth,1988
4. Changes in pulmonary ventilation during spinal anesthesia;Asklog;Surg Gynecol Obstet,1984
5. Respiratory effects of spinal anesthesia;Steinbrook;Anesth Analg,1991