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@article{MZ_1951__55_169239, author = {Hans-Georg Knoche}, title = {\"Uber den {Frobenius'schen} {Klassenbegriff} in nilpotenten {Gruppen.}}, journal = {Mathematische Zeitschrift}, pages = {71--83}, publisher = {mathdoc}, volume = {55}, year = {1951}, zbl = {0043.25804}, url = {http://geodesic.mathdoc.fr/item/MZ_1951__55_169239/} }
Hans-Georg Knoche. Über den Frobenius'schen Klassenbegriff in nilpotenten Gruppen.. Mathematische Zeitschrift, Tome 55 (1951), pp. 71-83. http://geodesic.mathdoc.fr/item/MZ_1951__55_169239/