TY - JOUR AU - V. D. Charushnikov TI - Optimal approximate methods for the solution of linear problems JO - Differencialʹnye uravneniâ PY - 1971 SP - 344 EP - 352 VL - 7 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1971_7_2_a14/ LA - ru ID - DE_1971_7_2_a14 ER -