1. Signs of endotracheal intubation;Howells, T.H.; Riethmuller, R.J.;Anaesthesia,1980
2. Esophageal intubation: a review of detection techniques;Birmingham, P.K.; Cheney, F.W.; Ward, R.J.;Anesth Analg,1986
3. The confidential enquiry into matemal deaths;Morgan, M.;Anaesthesia,1986
4. Endotracheal intubation: friend or foe;Scott, D.B.;BrMedy,1986
5. Concepts of fail-safe anaesthesia practice;Duberman, S.M.; Bendixen, H.H.,1984