1. Encyclopaedic der Augenheilkunde;Elschnig,1904
2. Suggestions for accurate records in ophthalmology, Elschnig's classification of normal disks;Bothman,1947
3. The early ophthalmoscopic diagnosis of glaucoma;Kronfeld;New Eng. J. Opt.,1952
4. Lectures on Glaucoma;Chandler,1965
5. The optic nerve;Kronfeld,1967