1. 1) E. Albrecht, Ziegler's Ztbl. Bd. 15, S. 982, 1902.
2. 2) Do, Verh. d. dent. path. Gesell. S. 95, 1903.
3. 3) Allen's, Commercial organic analyse. Vol.III, p.199-220, Philadelphia, 1917.
4. 4) J. Arneth, Die qualitative Blutlehre. Bd. 1, Leipzig, 1920.
5. 5) A. Arnold, Virch. Arch. Bd. 140, S. 411, 1895.