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Translated from Algebra i Logika, Vol. 14, No. 4, pp. 373–392, July–August, 1975.
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Belkin, V.P., Gorbunov, V.A. Filters in lattices of quasivarieties of algebraic systems. Algebra and Logic 14, 229–239 (1975). https://doi.org/10.1007/BF01668999
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DOI: https://doi.org/10.1007/BF01668999