1. Anderson W. A. D.: Pathology, 4th ed., p. 472. St. Louis: C. V. Mosby Co., 1961.
2. Ash J. E., Raum M.: Atlas of Otolaryngic Pathology. Washington, D.C.: Armed Forces Institute of Pathology, pp. 189–268, 411, 1956.
3. Boyd W.: Textbook of Pathology. 7th ed., p. 243. Philadelphia: Lea & Febiger Co., 1961.
4. Leiomyosarcoma of the Nasopharynx