1. A.H.A.-A.C.L.S. Guidelines;Circulation 102-I 129-I,2000
2. ASA difficult airway algorithm: New thoughts and considerations;Benumof,1996
3. Classical files;Boulton;Surv Anesthesiol,1983
4. Classical file;Calverley;Surv Anesthesiol,1984
5. The Respiratory Muscles: Mechanics and Neural Control;Campbell,1970