1. Arch;ALPER, M.G.; LAUBACH, J.L.;Ophihal. (Chicago); Amer,1968
2. Arch;CALMETTES, L.; DEODATI, F.; HURON, H.; BECHAC, G.;Ophtal. (Paris),1958
3. DELMARCELLE, Y., LUYCKX, j., and WEEKERS, R. (1969) Bull. Soc. belge Ophtal., no. 153, p. 638
4. ELLIOTT, R. (1960) Trans. ophthal. Soc. N.Z., 1959, I2, 87
5. Surv;GRUTZNER, P.; YAZAWA, K.; sPIvEY, B.E.;Ophthal,1970