%0 Journal Article %A Yu. K. Demjanovich %T On stability of projection methods %J Zapiski Nauchnykh Seminarov POMI %D 1971 %P 7-15 %V 23 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1971_23_a1/ %G ru %F ZNSL_1971_23_a1