1. Atlas of Paranasal Sinus Surgery;Ritter,1992
2. The Sinuses;Donald,1995
3. A comparative study of the sphenoid sinus (a study of 16 skulls);Dixon;Ann Otol,1937
4. Transphenoidal hypophysectomy;Hamberger;Arch Otol,1961
5. Clinical Anatomy of The Nose, Nasal Cavity, and Paranasal Sinuses;Lang,1989