1. "Ocular Surgery", trans. from 3rd Spanish;ARRUGA, H.,1952
2. BODIAN, M. (1961). Amer. J. Ophthal., 51, 1243.
3. DAVIS, F. A. (1944). Arch. Ophthal. (Chicago), 31, 321.
4. DUNNINGTON, J. H., and REGAN, E. F. (1953). Ibid., 50, 545.
5. " Medicina y Cirurgia " (quoted by Arruga;ESCAPINI, H.;Ibid; Quoted in "Surgery of the Eye Diseases,1958