1. The aspiration of stomach contents into the lungs during obstetric anesthesia;Mendelson;Am J Obstet Gynecol,1946
2. Report on confidential enquiries into maternal deaths in the United Kingdom 1988–1990;Department of Health and others,1994
3. Report on confidential enquiries into maternal deaths in the United Kingdom 1985–1987;Department of Health and others,1991
4. Report on confidential enquiries into maternal deaths in England and Wales 1982–1984, 1979–1981, 1976–1978, 1973–1975. London: HMSO
5. Observations on intragastric pressure;Spence;Anaesthesia,1967