@article{SEMR_2019_16_a130,
     author = {N. B. Uskova},
     title = {The matrix analysis of spectral projections for the perturbed self-adjoint operators},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {369--405},
     publisher = {mathdoc},
     volume = {16},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2019_16_a130/}
}