De WoodmanGraff: Laryngoscopy Under General Anesthesia. Trans. Am. Broncho-Esoph. Assn., pp. 48–57, 1961.
2.
LeJeuneFrancis E.: The Value of Suspension Laryngoscopy in Intralaryngeal Surgery. A.M.A. Arch. Otolaryng. 64:30–35 (July) 1955.
3.
PriestRobert F.WesolowskiStanley: Direst Laryngoscopy Under General Anesthesia. Trans. Am. Acad. of Ophth. and Otolaryng., pp. 639–648 (Sept.-Oct.) 1960.