References
- Berci G., Fleming W. B., Dunlop E. E., Madigan J. P., Campbell J. J., Kont L. A. New endoscopic technique for examination and cinematography of the nasopharynx. Cancer (New York) 1967; 20: 2103
- Bertelsen K., Andersen A. P., Elbrønd O., Lund C. Malignant tumours of the nasopharynx. Acta Radial 1975; 14: 177
- Buiter C. T. Endoscopy of the upper airways (Thesis). Excerpta Medico, Amsterdam 1976
- Hays H. The pharyngoscope, a new electrical instrument for examination of the pharynx, posterior nares, Eustachian tubes and larynx. Laryngoscope 1909; 19: 528
- Ward P. H., Berci G., Calcaterra T. C. Endoscopy. Indirect endoscopic examination of the larynx and nasopharynx, G. Berci. Appleton-Century-Crofts, New York 1976; 587