1. An artificial “air-way” for use during anaesthetisation;Hewitt;Lancet,1908
2. Frederic William Hewitt (1857-1916): first Frederic Hewitt Lecture delivered at the Royal College of Surgeons of England on 1st November, 1950;Edwards;Annals of the Royal College of Surgeons of England,1951
3. A nontraumatic pharyngeal airway;Guedel;Journal of the American Medical Association,1933