C. W. Long: «An account of the first use of sulphuric ether by inhalation as an anaesthetic in surgical operations», article a la revista Southern Medical and Surgical Journal, 5, pàgs. 705-713, 1849. L'article es troba publicatArxivat 2006-07-11 a Wayback Machine. en el lloc web JLRMedicalGroup.com.
C. W. Long: «An account of the first use of sulphuric ether by inhalation as an anaesthetic in surgical operations», article a la revista Southern Medical and Surgical Journal, 5, pàgs. 705-713, 1849. L'article es troba publicatArxivat 2006-07-11 a Wayback Machine. en el lloc web JLRMedicalGroup.com.