%0 Journal Article %A V. N. Trushnikov %T An estimate of error of an approximate solution that is obtained %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1982 %P 227-231 %V 22 %N 1 %U http://geodesic.mathdoc.fr/item/ZVMMF_1982_22_1_a24/ %G ru %F ZVMMF_1982_22_1_a24