%0 Journal Article %A N. Yu. Bakaev %A A. B. Bakushinskii %T On the theory of approximate methods for solving an ill-posed %J Doklady Akademii Nauk %D 1990 %P 777-782 %V 312 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1990_312_4_a0/ %G ru %F DAN_1990_312_4_a0