%0 Journal Article %A M. Nurubloev %T Boundary problems for a system of second-order equations of composite type %J Differencialʹnye uravneniâ %D 1982 %P 347-349 %V 18 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1982_18_2_a21/ %G ru %F DE_1982_18_2_a21