@article{DAN_1961_141_2_a2,
     author = {O. K. Bogaryan},
     title = {Convergence of the remainder in the {Bubnov--Galerkin} and {Ritz} methods},
     journal = {Doklady Akademii Nauk},
     pages = {267--269},
     publisher = {mathdoc},
     volume = {141},
     number = {2},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_141_2_a2/}
}