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Translated from Matematicheskie Zametki, Vol. 35, No. 6, pp. 921–926, June, 1984.
In conclusion, the author wishes to thank L. Ya. Kulikov and S. V. Rychkov for the useful discussions we had concerning the results of this paper.
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Ivanov, A.M. Necessary conditions for the coperiodicity of quotients of direct products of Abelian groups. Mathematical Notes of the Academy of Sciences of the USSR 35, 484–487 (1984). https://doi.org/10.1007/BF01139956
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DOI: https://doi.org/10.1007/BF01139956