%0 Journal Article %A F.G. Timmesfeld %T Groups generated by k-transvections. %J Inventiones mathematicae %D 1990 %P 167-206 %V 100 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1990__100_2_143782/ %F IM_1990__100_2_143782