%0 Journal Article %A N. Ya. Tikhonenko %T On an approximate solution of two-sided three-element boundary value problems with a shift, and their applications %J Differencialʹnye uravneniâ %D 1994 %P 1645-1651 %V 30 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1994_30_9_a18/ %G ru %F DE_1994_30_9_a18