@article{INTO_2021_195_a13,
     author = {G. V. Garkavenko and N. B. Uskova},
     title = {On estimates of eigenvalues of infinite block tridiagonal matrices},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {118--126},
     publisher = {mathdoc},
     volume = {195},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2021_195_a13/}
}