@article{IVM_2022_2_a1,
     author = {S. F. Kamornikov and V. N. Tyutyanov},
     title = {On some aspects of the {Kegel-Wielandt} $\sigma$-problem},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {18--28},
     publisher = {mathdoc},
     number = {2},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2022_2_a1/}
}