4Goerig M,Schulte AM,Each J.Early contributions for the development of nitrous oxide-oxygen anesthesia in central Europe[J].Anaesthesiol Resnim,2002,27(2):42-53.
5Ameircan Academy of Pediatrics.Ameiracn Academy of Pediatric Dentistry[J].Pediatrics,2006,118(6):2587-2602.
6Chapman W P,Arrowoodd J G,Beecher H K.The analgesic effects of low concentrations of nitrous oxide compared in man with morphine sulphate[J].J Clin Invest,2003,10(22):871-874.
8Clark M,Brunick A.Handbook of nitrous oxide and Oxygen Seda-tion[M].2nd ed.UK:Mosby Elsevier,2003:1-256.
9Goerig M,Sehulte AM,Esch J.Early contributions for the develop-ment of nitrous oxide-oxygen anesthesia in central Europe[J].Anaesthesiol Resnim,2002,27(2):42-53.
10Ameirean Academy of Pediatrics,Ameirean Academy of PediatricDentistry[J].Pediatrics,2006,118(6):2587-2602.
