%0 Journal Article %A S. V. Simeonov %T A successive approximation process and its application in solving functional equations with non-linear operators of monotonic type %J Doklady Akademii Nauk %D 1961 %P 1033-1034 %V 138 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_138_5_a12/ %G ru %F DAN_1961_138_5_a12