1. de Schweinitz.-Ophthalmic Record, p. 23, 1909.
2. Gilbert's article in Schieck and Bruckner's Kurzes;Handbuch
3. Fuchs, E.-Zentralb. f. Augenheilk., Vol. VIII, p. 100, 1923.
4. Koyanagi.-Klin. Monatsbl. f. Augenheilk., Vol. LXXXII, p. 194, 1929.
5. K )moto.-Klin. Monatsbl. f. Augenheilk., Vol. XLIX, pt. 1, 1911.