%0 Journal Article %A Yu. N. Subbotin %T Extremal problems of functional interpolation, and mean interpolation splines %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1975 %P 118-173 %V 138 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_1975_138_a5/ %G ru %F TM_1975_138_a5