1. Barnett, E. V., J. P. Nasou, J. P. Utz, andS. Baron: Antibodies to enteroviruses in hypogammaglobulinemic patients. New. Engl. J. Med.262, 563 (1960).
2. Blattner, R. J., J. O. Norman, F. M. Heys, andI. Aksu: Antibody response to cutaneous inoculation with vaccinia virus: Viremia and viruria in vaccinated children. J. Pediat.64, 839 (1964).
3. Cutchins, E., J. Warren, andW. P. Jones: The antibody response to smallpox vaccination as measured by a tissue culture plaque method. J. Immunol.85, 275 (1960).
4. Ehrengut, W.: Erfahrungen mit Vakzineantigen. Münch. med. Wschr.1959, 921.
5. Falchetti, M., etJ. Merieux: Titrage sur lapins et sur cultures de tissus des anticorps neutralisants de sérum et de laits de vaches immunisies par le virus de la vaccine. Rev. Path. gén.58, 399 (1958).