1. LAVAL, J. (1952). Amer. J. Ophthal., 35, 551.
2. MERZ, M. (1952). Klin. Oczna, 22, 49.
3. OZAZEWSKI, J. C., and BENNETT, V. (1952). Amer. J. Ophthal., 35, 547.
4. In " Modem Practice in Tuberculosis ", ed. T. Holmes Sellors and;ROBB-SMITH, A.H.T.,1932
5. J. L. Livingstone, vol. 2, p. 262.