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@article{MZ_1963__82_170196, author = {Erika A. Mares}, title = {Semi-perfect modules.}, journal = {Mathematische Zeitschrift}, pages = {347--360}, publisher = {mathdoc}, volume = {82}, year = {1963}, zbl = {0131.27401}, url = {http://geodesic.mathdoc.fr/item/MZ_1963__82_170196/} }
Erika A. Mares. Semi-perfect modules.. Mathematische Zeitschrift, Tome 82 (1963), pp. 347-360. http://geodesic.mathdoc.fr/item/MZ_1963__82_170196/