@article{DAN_1967_173_1_a8,
     author = {Yu. I. Lyubich},
     title = {Rates of convergence of coordinate relaxation for a quadratic functional},
     journal = {Doklady Akademii Nauk},
     pages = {37--39},
     publisher = {mathdoc},
     volume = {173},
     number = {1},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_173_1_a8/}
}