%0 Journal Article %A V. V. Tikhomirov %T The unconditional basis property of root vectors of nonlocal problems for systems of equations with deviating arguments %J Differencialʹnye uravneniâ %D 1990 %P 147-153 %V 26 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1990_26_1_a17/ %G ru %F DE_1990_26_1_a17