%0 Journal Article %A L. R. Volevich %T Regularity of solutions of systems of differential equations with variable coefficients %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1961 %V 16 %N 2 %U http://geodesic.mathdoc.fr/item/RM_1961_16_2_a18/ %G ru %F RM_1961_16_2_a18