@article{DAN_1961_136_6_a0,
     author = {G. A. Bessmertnykh},
     title = {The behavior of corrections in some methods of approximate calculation of bounds of the spectrum of a self-adjoint operator},
     journal = {Doklady Akademii Nauk},
     pages = {1265--1268},
     publisher = {mathdoc},
     volume = {136},
     number = {6},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_136_6_a0/}
}