1. 1. Draf W. Endoscopy of the paranasal sinuses, New York: Springer-VerlagInc, 1983.
2. 2. Woodham J. History of the development of surgery for sinusitis. In Donald PJ, Gluckman JL, Rice DH, editors. The sinuses. New York: Raven; 1995. P.3-14.
3. 3. Hirschmann A. About endoscopy of the nose and sinuses. A new method of investigation. Archives of Otorhinolaryngology, 1903;14:195-7.
4. New instrument: the sinuscope;Maltz;Laryngoscope,1925
5. 5. Heerman H. About endonasal surgery under usage of binocular microscope. Arch ear NasKehlkopfheilk 1958,171:295-7.