%0 Journal Article %A Isaacs, I. M. %T Systems of equations and generalized characters in groups %J Canadian journal of mathematics %D 1970 %P 1040-1046 %V 22 %N 5 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-120-0/ %R 10.4153/CJM-1970-120-0 %F 10_4153_CJM_1970_120_0