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@article{MZ_1968__107_171072, author = {William F. Reynolds}, title = {Isometries and {Principal} {Blocks} of {Group} {Characters.}}, journal = {Mathematische Zeitschrift}, pages = {264--270}, publisher = {mathdoc}, volume = {107}, year = {1968}, zbl = {0174.05402}, url = {http://geodesic.mathdoc.fr/item/MZ_1968__107_171072/} }
William F. Reynolds. Isometries and Principal Blocks of Group Characters.. Mathematische Zeitschrift, Tome 107 (1968), pp. 264-270. http://geodesic.mathdoc.fr/item/MZ_1968__107_171072/