1. Suggestive evidence that the “blocking” antibodies of tumor-bearing individuals may be antigen-antibody complexes;Sjögren,1971
2. Serum-mediated protection of neoplastic cells from inhibition by lymphocytes immune to their tumor-specific antigens;Hellström,1969
3. Blocking of cell-mediated tumor immunity by sera from patients with growing neoplasms;Hellström;Int. J. Cancer,1971
4. Demonstration of cell-mediated and blocking immune responses to tumor antigens in cancer patients with the colony-inhibition-in-gel test;Cummings;Isr. J. Med. Sci.,1973
5. Specific inhibition of sarcoma-specific cellular immunity by sera from patients with growing sarcomas;Cohen;Int. J. Cancer,1973