1. Alechinsky, A.: Ann. Inst. Pasteur 63, 41 (1939).
2. Amako, T.: zit. n. Reith.
3. Apitz, K.: Virchows Arch. 293, 1 (1934).
4. Arnold, L., C. J. Gustafson, B. E. Montgomery, T. G. Hull and C. Singer: Amer. J. Hyg. 11, 345 (1930).
5. Bang, F.: J. of exper. Med. 74, 387 (1941).