1. Brown-Pusey, Transact. of Amer. ophthalm. Society11, 722. 1906–1908.
2. Ishihara, Klin. Monatsbl. f. Augenheilk.49 (I) 191. 1911.
3. Miyashita, Klin. Monatsbl. f. Augenheilk.48 (I), S. 548. 1910.
4. zur Nedden, Zeitschr. f. Augenheilk.18, 300. 1907.
5. Paul, Klin. Monatsbl. f. Augenheilk.43 (I), S. 154. 1905.