@article{PFMT_2024_4_a14,
     author = {S. F. Kamornikov and V. N. Tyutyanov},
     title = {The {Kegel--Wielandt} $\sigma$-problem: review of results},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {89--97},
     publisher = {mathdoc},
     number = {4},
     year = {2024},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2024_4_a14/}
}