%0 Journal Article %A V. I. Zhegalov %T Problems with derivatives in the boundary conditions %J Trudy seminara po kraevym zadačam %D 1973 %P 38-52 %V 10 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/KUKZ_1973_10_10_a4/ %G ru %F KUKZ_1973_10_10_a4