1. Br�cke, F. T. v.: Arch. exper. Pathol. Pharmakol.198, 100 (1944).
2. Peters, D. W. A.: Pharm. J.115, 17, 36 (1952).
3. Heisch, R. B.: E. African Med. J.22 7 (1945).
4. Wolfes, O.: Arch. Pharm.268, 81 (1930).
5. Paris, M. R., u.H. Moyse: Ann. pharm. fran�.15 89 (1957).