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@article{MZ_1962__78_170008, author = {Gerhard Betsch}, title = {Ein {Radikal} f\"ur {Fastringe.}}, journal = {Mathematische Zeitschrift}, pages = {86--90}, publisher = {mathdoc}, volume = {78}, year = {1962}, zbl = {0101.27202}, url = {http://geodesic.mathdoc.fr/item/MZ_1962__78_170008/} }
Gerhard Betsch. Ein Radikal für Fastringe.. Mathematische Zeitschrift, Tome 78 (1962), pp. 86-90. http://geodesic.mathdoc.fr/item/MZ_1962__78_170008/