%0 Journal Article %A B. M. Arkhipov %T The Green's matrix of a periodic boundary value problem for a system of two second order linear differential equations %J Differencialʹnye uravneniâ %D 1968 %P 1055-1064 %V 4 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1968_4_6_a10/ %G ru %F DE_1968_4_6_a10