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Additional information
Tashkent. Translated from Algebra i Logika, Vol. 30, No. 3, pp. 293–305, May–June, 1991.
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Kasymov, N.K. Positive algebras with congruences of finite index. Algebra and Logic 30, 190–199 (1991). https://doi.org/10.1007/BF01978852
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DOI: https://doi.org/10.1007/BF01978852