@article{FPM_2012_17_1_a8,
     author = {V. M. Levchuk and G. S. Suleimanova},
     title = {The normal structure of the unipotent subgroup in {Lie} type groups and its extremal subgroups},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {155--168},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2012_17_1_a8/}
}