1. Abrahms, A., andP. P. Cohen: J. of biol. Chem.177, 439 (1949).
2. Andreasen, E., J. Bing, O. Gottlieb u.N. Harboe: Acta physiol. scand. (Stockh.)15, 254 (1948).
3. Bonnefoi, A., etJ. Grabar: Ann. Inst. Pasteur73, 259 (1947).
4. Cain, J. C., J. H. Grindlay, J. L. Bollman, E. V. Flock andF. C. Mann: Surg. etc.85, 558 (1947).
5. Chase, J. H., A. White andT. F. Dougherty: J. of Immun.52, 101 (1946).