1. Ophthalmic Pathology,1962
2. Elwin, H.: Diseases of the Retina. New York, Blakiston, ed. 2, pp. 41, 167, 172.
3. Ibid, p. 63.
4. Textbook of Ophthalmology: Volume III. Diseases of the Inner Eye;Duke-Elder,1945
5. Slitlamp examination of the fundus;Pischel;Arch. Ophth.,1958