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@article{JRAM_1977__295_151928, author = {Wolfgang Gasch\"utz}, title = {Subgroup criteria for an abelian group.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {214--220}, publisher = {mathdoc}, volume = {295}, year = {1977}, zbl = {0356.20001}, url = {http://geodesic.mathdoc.fr/item/JRAM_1977__295_151928/} }
Wolfgang Gaschütz. Subgroup criteria for an abelian group.. Journal für die reine und angewandte Mathematik, Tome 295 (1977), pp. 214-220. http://geodesic.mathdoc.fr/item/JRAM_1977__295_151928/