@article{GDZPPN002111292, title = {On perfect isometries and isotypies in finite groups.}, journal = {Inventiones mathematicae}, volume = {114}, year = {1993}, pages = {139-192}, zbl = {0811.20009}, url = {http://dml.mathdoc.fr/item/GDZPPN002111292} }
Fong, Paul; Harris, Morton E. On perfect isometries and isotypies in finite groups.. Inventiones mathematicae, Tome 114 (1993) pp. 139-192. http://gdmltest.u-ga.fr/item/GDZPPN002111292/