@article{DE_1989_25_11_a9,
     author = {V. L. Kolyadin and V. F. Kravchenko},
     title = {Optimal solution of operator equations when the initial data are of finite dimension},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1891--1897},
     publisher = {mathdoc},
     volume = {25},
     number = {11},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_11_a9/}
}