@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/}
}