1. Askanazy, M.: Dtsch. Arch. klin. Med.99, 333 (1910).
2. Berblinger, W.: Wien. med. Wschr.1950, 172. Ref. Zbl. Tbk. forsch.57, 141 (1950).
3. Bünger, P., u.W. Geiger: Dtsch. Z. Nervenheilk.164, 427 (1950).
4. Cocchi, C., etG. Pasquinucci: Bull. Org. Mond. Santé3, 215 (1950). Ref. Zbl. Tbk.forsch.58, 367 (1951).
5. Cossandi, E., eL. Maggiora: Lattante21, 507 (1950). Ref. Zbl. Tbk.forsch.58, 130 (1951).