1. Adler, H.: Röntgendiagnostik der Kehlkopftuberkulose. Beitr. Klin. Tuberk. 85, 556–560 (1934).
2. Adler, G., u. H. Wotzilka: Zur Röntgenologie der Larynxtuberkulose. Fortschr. Röntgenstr. 37, 288–290 (1928)
3. Akerlttnd, A., and S. Welin: Roentgen diagnosis of malignant tumors within the boundary region between the pharynx and esophagus. Acta radiol. (Stockh.) 25, 883–911 (1944). Allman, Ch. H., and D. P. Cordray: Laryngocele. Ann. Otol. (St. Louis) 51, 586–591 (1942).
4. Ardran, G. M., W. H. Kelleher, and F. H. Kemp: Cineradiographic studies of glossopharyngeal breathing. Brit. J. Radiol. 82, 322–328 (1959).
5. F. H. Kemp: (a) Protection of laryngeal airways during swallowing. Brit. J. Radiol. 25, 406–416 (1952).