1. Bard, J.: Z. Augenheilk. 85, 261 (1935).
2. Baumgart, B.: Boll. Oculist 12, 560–597 (1933).
3. Bellows,J. G.: Bull. Northwest. Univ. M. School. 18, 232–237 (1944);
4. Bellows, J. G.: ref. nach Barkan, O.: Ophthalmology in the War Years, Meyer-Wiener, Chicago2, (1948).
5. Berliner, M.: Amer. J. ophthal. 34, 899–911 (1951).