1. ALBERS-SCHONBERG, H. E. (1904). Munch. med. Wschr., 51, 365.
2. ALPERS, B. J., and GROFF, R. A. (1934). Arch. Neurol. Psychiat. (Chicago), 31, 713.
3. CUSHING, H., and EISENHARDT, L. (1929). Arch. Ophthal. (Chicago), 1, 168.
4. Meningiomas. Their Classification, Regional Behaviour, Life History, and Surgical End Results;CUSHING, H.; EISENHARDT, L.,1938
5. Orbital Tumors;DANDY, W.E.,1941