@article{DAN_1962_143_3_a4,
     author = {V. V. Ivanov},
     title = {A general approximation method for solving linear problems},
     journal = {Doklady Akademii Nauk},
     pages = {514--517},
     publisher = {mathdoc},
     volume = {143},
     number = {3},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_143_3_a4/}
}