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Translated from Sibirskii Matematicheskii Zhurnal, Vol. 15, No. 3, pp. 580–597, May–June, 1974.
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Frenkin, B.R. ε-free models. Sib Math J 15, 416–428 (1974). https://doi.org/10.1007/BF00969811
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DOI: https://doi.org/10.1007/BF00969811