1. Brimacombe JR, Berry AM, Brain AIJ. The laryngeal mask airway. Anesthesiol Clin North Amer 1995; 13: 411–37.
2. Breivik H, Cousins MJ, Löfström JB. Sympathetic neural blockade of upper and lower extremity.In: Cousins MJ, Bridengaugh PO (Eds). Neural Blockade in Clinical Anesthesia and Management of Pain, 3rd ed. Philadelphia: Lippincott-Raven Publishers, 1998: 411–45.
3. Morgan GE Jr, Mikhail MS. Clinical Anesthesiology, 2nd ed. Stamford: Appleton & Lange, 1996.