%0 Journal Article %A A. T. Taldykin %A E. A. Isakova %T The method of two systems of functions in boundary value problems %J Differencialʹnye uravneniâ %D 1985 %P 1362-1368 %V 21 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1985_21_8_a9/ %G ru %F DE_1985_21_8_a9