@article{GDZPPN002360284, title = {Characterization of perfect involution groups.}, journal = {Mathematica Scandinavica}, volume = {64}, year = {1989}, pages = {245-258}, zbl = {0739.43007}, url = {http://dml.mathdoc.fr/item/GDZPPN002360284} }
Bisgaard, Torben Maack. Characterization of perfect involution groups.. Mathematica Scandinavica, Tome 64 (1989) pp. 245-258. http://gdmltest.u-ga.fr/item/GDZPPN002360284/