1. Apffel, C. A., Peters, J. H.: Tumors and serum glycoproteins. The ‘symbodies’. Progr. exp. Tumor Res. (Basel)12, 1 (1969).
2. Beckman, L.: Effect of phytohemagglutinin on human serum and cell proteins. Nature (Lond.)195, 582 (1962).
3. Bloch-Shtacher, N., Hirschhorn, K., Uhr, J. W.: Stimulation of non-immunized human lymphocytes by antigen-antibody complexes. Clin. exp. Immunol.3, 889 (1968).
4. Bo Gahne: Iso-antibodies against slow α2-globulin in cattle. 8th Europ. Conf. Animal Blood Groups, Ljubljana, Yugosl. 1962.
5. Burstein, M., Samaille, J.: J. Physiol. (Paris)49, 83 (1957); zit. n. [46].