1. Hirschwald, Berlin hIOYT, W. F., RIOS-MONTENEGRO, E. N., BEHRENS, M. M., and ECKELHOFF, R. J. (1972)
2. Folia;ITO, H.; OZAWA, K.; SUGA, S.; MIZUNO, K.;ophthal,1969
3. v;RONNE, H.;Graefes Arch. Ophthal,1909
4. v;VOGT, A.;Graefes Arch. Ophthal; Klin,1913
5. --- (1921) Ibid., 66, 7I8 WEEKERS, J. F. (1969) Arch. Ophtal., 29, 47