@article{DAN_1960_131_2_a1,
     author = {G. A. Bessmertnykh},
     title = {Two methods for approximate solution of operator equations in {Hilbert} space},
     journal = {Doklady Akademii Nauk},
     pages = {226--229},
     publisher = {mathdoc},
     volume = {131},
     number = {2},
     year = {1960},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1960_131_2_a1/}
}