1. v;BABEL, J.;Bull. Soc. Ophtal. Fr; Klin,1967
2. Ibid., 132, 626 and BAUERMANN, D. (1964) Ibid., 145, 641
3. BAR, C. (1925) Z. Augenheilk., 57, 628
4. Die angeborenen Kolobome des Augapfels;BECKWITH, c J.;J. exp. Zool; Arch,1927
5. Arch;DUYSE, V.A.N.;Ophtal. (Paris),1898