%0 Journal Article %A N. J. Yurchuk %T Boundary value problems for equations with operators of the form $\frac{d^{2m}}{dt^{2m}}+A$ %J Differencialʹnye uravneniâ %D 1974 %P 950-952 %V 10 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1974_10_5_a24/ %G ru %F DE_1974_10_5_a24