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3. G. T. Sukhikh et al., Vestn. Akad. Med. Nauk SSSR, No. 11, 16 (1983).
4. B. B. Fuks, in: Interaction Between Normal Killer Cells and Tumor Cells [in Russian], Moscow (1983), pp. 5?26.
5. B. F. Argyris, Cell. Immunol.,57, 62 (1981).