%0 Journal Article %A D. A. Serkov %A A. G. Chentsov %T Programmed iteration method and operator convexity in an abstract retention problem %J Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹûternye nauki %D 2015 %P 348-366 %V 25 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/VUU_2015_25_3_a4/ %G ru %F VUU_2015_25_3_a4