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This paper was written while the second author spent his sabbatical year at the Universität Essen.
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Göbel, R., May, W. The construction of mixed modules from torsion-free modules. Arch. Math 48, 476–490 (1987). https://doi.org/10.1007/BF01190354
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DOI: https://doi.org/10.1007/BF01190354