%0 Journal Article %A S. I. Novikov %T Extremal function interpolation for a second-order linear differential operator %J Trudy Instituta matematiki i mehaniki %D 2019 %P 164-176 %V 25 %N 4 %U http://geodesic.mathdoc.fr/item/TIMM_2019_25_4_a17/ %G ru %F TIMM_2019_25_4_a17