1. Vernon J: Tinnitus causes, valuation, and treatment in otolaryngology. Edited by English GM. Philadelphia: Lippincott; 1992:1–25.
2. Vernon J: Tinnitus 1989: current knowledge and treatment therapy. Hearing J 1989, 42:7–11.
3. Vital and Health Statistics Publication Series 11;National Center for Health Statistics,1980
4. Schleuning A: Medical aspects of tinnitus. Hearing J 1989, 42:12–15.
5. Dobie RA: Tinnitus and depression. Int Tinnitus J 1997, 3:33–34.