@article{AA_2011_23_5_a4,
     author = {I. M. Pevzner},
     title = {Width of groups of type $\mathrm E_6$ with respect to root {elements.~I}},
     journal = {Algebra i analiz},
     pages = {155--198},
     year = {2011},
     volume = {23},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_2011_23_5_a4/}
}