1. Taylor EJ (1988) Dorland's illustrated medical dictionary. (27th edn), Saunders, Philadelphia, USA, pp. 359.
2. Ocular coloboma: a reassessment in the age of molecular neuroscience;Gregory;J Med Genet 41(12),2004
3. Shields JA, Shields CL (2004) Orbital cysts of childhood--classification, clinical features, and management. Surv Ophthalmol 49(3): 281-299.
4. Ocular colobomata;Onwochei;Surv Ophthalmol 45(3),2000
5. Histopathologic study of ocular changes in a syndrome of multiple congenital anomalies;Duvall;Am J Ophthalmol 103(5),1987