TY - JOUR AU - V. L. Kolyadin AU - V. F. Kravchenko TI - Optimal solution of operator equations when the initial data are of finite dimension JO - Differencialʹnye uravneniâ PY - 1989 SP - 1891 EP - 1897 VL - 25 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1989_25_11_a9/ LA - ru ID - DE_1989_25_11_a9 ER -