@article{MT_2023_26_1_a1,
     author = {G. V. Demidenko and V. S. Prokhorov},
     title = {On location of the matrix spectrum with respect to a parabola},
     journal = {Matemati\v{c}eskie trudy},
     pages = {26--40},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {2023},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MT_2023_26_1_a1/}
}