@article{DAN_1992_323_6_a5,
     author = {A. V. Knyazev and A. L. Skorokhodov},
     title = {Iterative methods of gradient type in a subspace for a partial},
     journal = {Doklady Akademii Nauk},
     pages = {1020--1023},
     publisher = {mathdoc},
     volume = {323},
     number = {6},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_323_6_a5/}
}