1. 1. Mann I: Developmental Abnormalities of the Eye ed 2. Philadelphia JB Lippincott Co 1957 pp 66-69.
2. 2. Duke-Elder S: System of Ophthalmology Normal and Abnormal Development: Congenital Deformities. St Louis CVMosby Co 1964 vol 3 part 2 pp 456-487.
3. 3. Pagon RA: Ocular coloboma. Surv Ophthalmol 1981; 25:223-236.
4. 4. Makley TA Battles M: Microphthalmos with cyst. Surv Ophthalmol 1969; 13:200-206.
5. 5. Kok-van Alphen CC Manschot WA Frederiks E et al: Microphthalmos and orbital cyst. Ophthalmologica 1973; 167:389-392.