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Financial support for this paper was furnished by theMinisterium für Wissenschaft und Forschung des Landes Nordrhein-Westfalen under the titleÜberabzählbare abelsche Gruppen
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Dugas, M., Göbel, R. On endomorphism rings of primary abelian groups. Math. Ann. 261, 359–385 (1982). https://doi.org/10.1007/BF01455456
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DOI: https://doi.org/10.1007/BF01455456