%0 Journal Article %A F. E. Lomovtsev %T A priori estimates of solutions of boundary value problems for some differential-operator equations of even order %J Differencialʹnye uravneniâ %D 1979 %P 991-999 %V 15 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1979_15_6_a3/ %G ru %F DE_1979_15_6_a3