1. and 2. Feigenbaum, A.: Cataract operation: Its origin in antiquity and spread from East to West. Acta Cong. Internat. Histoire Sci., Jerusalem, 1953, pp. 298–301; Acta Med. Orient., 13:53–58, 1954.
2. Indian Operation of Couching for Cataract;Elliot,1917
3. The book of the ten treatises on the eye ascribed to Hunain ibn Ishaq, Arabic text edited and translated;Meyerhof,1928
4. Kannten die Babylonier den grauen Star?;Musy;Ztschr. f. Augenh.,1916