1. J. Bang, Biochem. Z.90, 383 (1918);91, 104 u. 111 (1918);94, 359 (1919).
2. Berczeller, ebenda90, 288 (1918).
3. Beumer u.Bürger, Z. exper. Path. u. Ther.13, 342 (1913).
4. Bordet u.Delange, Arch. f. exper. Path.71 (1913).
5. B. Clarke, ref. Zorg. Chir.39, 3 (1927).