1. 1. Duke-Elder: System of Ophthalmology. Vol 13 part 2 Henry Kimpton 1974 p 1113.
2. 2. Alfano J: Ophthalmological aspects of neuroblastomatosis: A study of 53 verified cases. Trans Amer Acad Ophthalmol Otolaryngol 1968; 72:830-848.
3. 3. Reese A: Tumors Of The Eye ed 3 New York Harper & Row 1976 p 167.
4. 4. Sanders T: Metastatic carcinoma of the iris. Am J Ophthalmol 1938; 21:646-651.
5. 5. Kinnier L Draper G: Neuroblastoma its natural history and prognosis: A study of 487 cases. Brit Med J 3:5926.