@article{10_4153_CJM_1970_120_0,
     author = {Isaacs, I. M.},
     title = {Systems of equations and generalized characters in groups},
     journal = {Canadian journal of mathematics},
     pages = {1040--1046},
     year = {1970},
     volume = {22},
     number = {5},
     doi = {10.4153/CJM-1970-120-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-120-0/}
}