1. Eggston A. A., Wolff D. (1947) Histopathology of the Ear, Nose and Throat. Baltimore; 1, 629.
2. Lack H. L. (1906) The Diseases of the Nose and its Accessory Sinuses. London; 1, 173.
3. Luc H. (1900) Leçons sur les Suppurations. Paris; p. 291.
4. MacKenzie M. (1884) A Manual of Diseases of the Throat and Nose. London; 2, 353.