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Translated from Algebra i Logika, Vol. 15, No. 2, pp. 227–234, March–April, 1976.
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Slobodskoi, A.M., Fridman, É.I. Undecidable universal theories of lattices of subgroups of Abelian groups. Algebra and Logic 15, 142–146 (1976). https://doi.org/10.1007/BF01877238
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DOI: https://doi.org/10.1007/BF01877238