@article{GDZPPN002109220,
title = {Groups generated by k-root subgroups.},
journal = {Inventiones mathematicae},
volume = {104},
year = {1991},
pages = {575-666},
zbl = {0794.20057},
url = {http://dml.mathdoc.fr/item/GDZPPN002109220}
}
Timmesfeld, F.G. Groups generated by k-root subgroups.. Inventiones mathematicae, Tome 104 (1991) pp. 575-666. http://gdmltest.u-ga.fr/item/GDZPPN002109220/