@article{IM_1990__100_2_143782,
     author = {F.G. Timmesfeld},
     title = {Groups generated by k-transvections.},
     journal = {Inventiones mathematicae},
     pages = {167--206},
     publisher = {mathdoc},
     volume = {100},
     number = {2},
     year = {1990},
     zbl = {0697.20018},
     url = {http://geodesic.mathdoc.fr/item/IM_1990__100_2_143782/}
}