1. Chandler and Grant's Glaucoma;Epstein,1986
2. Texbook of Glaucoma;Shields,1987
3. Becker-Shaffer's Diagnosis and Therapy of the Glaucomas;Hoskins,1989
4. Clinical evaluation of the optic disc and retinal nerve fiber layer;Airaksinen,1989
5. Reproducibility of photogrammetric optic disc cup measurements;Takamoto;Invest Ophthalmol Vis Sci,1985