@article{DAN_1964_156_2_a5,
     author = {V. A. Medvedev},
     title = {On convergence of the projection method in eigenvalue problems},
     journal = {Doklady Akademii Nauk},
     pages = {258--260},
     publisher = {mathdoc},
     volume = {156},
     number = {2},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_156_2_a5/}
}