@article{IVM_1972_6_a11,
     author = {T. O. Shaposhnikova},
     title = {Asymptotic estimates for the convergence of the {Ritz} method in eigenvalue problems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {86--91},
     publisher = {mathdoc},
     number = {6},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1972_6_a11/}
}