1. Furukawa, T., A. Vaheri, andS. A. Plotkin: Growth of rubella virus in BHK-21 cells. III. Production of complement-fixing antigens. Proc. Soc. exp. Biol. (N.Y.)125, 1098?1102 (1967).
2. Schmidt, N. J., E. H. Lennette, andJ. Dennis: Density gradient centrifugation studies on rubella complement-fixing antigens. J. Immunol.99, 399?405 (1967).
3. Schmidt, N. J., E. H. Lennette, P. S. Gee, andJ. Dennis: Physical and Immunologic properties of rubella antigens. J. Immunol.100, 851?857 (1968).
4. Schmidt, N. J., andB. Styk: Immunodiffusion reactions with rubella antigens. J. Immunol.101, 210?216 (1968).
5. Salmi, A.: Acta path, microbiol. scand.76, 271?278 (1969).