1. Renkonen, K. O.: Ann. Med. exper. Biol. fenn.26, 66 (1948).
2. Renkonen, K. O.: Ann. Med. exp. Biol. fenn.28, 45 (1950).
3. Kolumies, R.: Ann. Med. exp. Biol. fenn.27, 20 (1949).
4. Kolumies, R.: Ann. Med. exp. Biol. fenn.27, 185 (1949).
5. Boyd, W. C., u.R. M. Reguera: J. Immunology62, 333 (1949).