@article{MZM_2021_109_4_a6,
     author = {S. F. Kamornikov and V. N. Tyutyanov},
     title = {On the {Kegel--Wielandt} $\sigma${-Problem}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {564--570},
     publisher = {mathdoc},
     volume = {109},
     number = {4},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2021_109_4_a6/}
}