1. The evolution of the visual apparatus;Duke-Elder,1958
2. Diseases of the eye and ocular adnexae in reptiles;Millichamp;J Am Vet Med Assoc,1983
3. Comparative anatomy of the eye;Prince,1956
4. Ophthalmic anatomy;Samuelson,1999
5. A reevaluation of the comparative anatomy of the eutherian iridocorneal angle and associated ciliary body musculature;Samuelson;Vet Comp Ophthalmol,1996