1. Scarpa: Quoted by Byers, W. G. M.
2. Wishart: Quoted by Byers, W. G. M.
3. The primary intradural tumors of the optic nerve: (fibromatosis nervi optici);Byers;Stud. Roy. Victoria Hosp., Montreal,1901
4. Primary tumours of the optic nerve;Hudson;Roy. London Ophth. Hosp. Rep.,1912
5. Primary endothelioma of the optic nerve sheath;Goar,1926