1. COLLIER, M. (1959) Bull. Soc. Ophtal.Fr., p.737
2. System of Ophthalmology;DUKE-ELDER, S.,1965
3. Virchows Arch;Kimpton, London F.E.Y.R.T.E.R.; F.;path. Anat,1954
4. NAUMANN, G., GASS, J. D. M., and FONT, R. L. (1968) Amer. J. Ophthal., 65, 533
5. Clinical Neuro-ophthalmology;WALSH, F.B.; HOYT, W.F.,1969