%0 Journal Article %A N. A. Bobylev %T On the theory of factormethods for approximate solution of nonlinear problems %J Doklady Akademii Nauk %D 1971 %P 9-12 %V 199 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1971_199_1_a0/ %G ru %F DAN_1971_199_1_a0