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Barnaul. Translated fromSibirskiî Matematicheskiî Zhurnal, Vol. 40, No. 1, pp. 167–176, January–February, 1999.
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Polovnikova, E.S. On the axiomatic ranks of some quasivarieties. Sib Math J 40, 143–152 (1999). https://doi.org/10.1007/BF02674301
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DOI: https://doi.org/10.1007/BF02674301