1. Araki: Hoppe-Seylers Z.16, 453 (1892).
2. Claude, Bernard: Leçons de physiologie, p. 183. Paris: J. B. Baillière 1855.
3. Boehm u.Hoffmann: Arch. f. exper. Path.8, 375 (1878).
4. Brentano: Z. klin. Med.120, 249 (1932).—Dtsch. med. Wschr.1932 I, 699.
5. Brentano: Z. klin. Med.124, 237 (1933).—Dtsch. med. Wschr.1933 I, 12.