1. Failed tracheal intubation;King, T.A.; Adams, A.P.;Br J Anaesth,1990
2. The unanticipated difficult airway with recommendations for management;Crosby, E.T.; Cooper, R.M.; Douglas, M.J.; Doyle, D.J.; Hung, O.R.; Labrecque, P.; Muir, H.; Murphy, M.F.; Preston, R.P.; Rose, D.K.; Roy, L.;Can J Anaesth,1998
3. Predicting difficult airways;Vaughan, R.S.;Br J Anaesth, CEPD Reviews,2001
4. Interobserver reliability between a nurse and anaesthetist of tests used for predicting difficult tracheal intubation;Hilditch, W.G.; Kopka, A.; Crawford, J.M.; Asbury, A.J.;Anaesthesia,2004
5. Difficult Airway Society guidelines for management of the unanticipated difficult intubation;Henderson, J.J.; Popat, M.T.; Latto, I.P.; Pearce, A.C.;Anaesthesia,2004