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Translated from Algebra i Logika, Vol. 27, No. 3, pp. 316–326, May–June, 1988.
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Pinus, A.G. Covers in the epimorphism skeletons of varieties of algebras. Algebra and Logic 27, 198–204 (1988). https://doi.org/10.1007/BF01978565
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DOI: https://doi.org/10.1007/BF01978565