@article{GDZPPN002391791, title = {Group characters and commutators.}, journal = {Mathematische Zeitschrift}, volume = {78}, year = {1962}, pages = {122-126}, zbl = {0129.01902}, url = {http://dml.mathdoc.fr/item/GDZPPN002391791} }
Gallagher, P. X. Group characters and commutators.. Mathematische Zeitschrift, Tome 78 (1962) pp. 122-126. http://gdmltest.u-ga.fr/item/GDZPPN002391791/