%0 Journal Article %A S. N. Mishin %T Generalization of the Lagrange Method to the Case of Second-Order Linear Differential Equations with Constant Operator Coefficients in Locally Convex Spaces %J Matematičeskie zametki %D 2018 %P 75-91 %V 103 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_2018_103_1_a6/ %G ru %F MZM_2018_103_1_a6