%0 Journal Article %A N. I. Samedov %T On the solvability of a boundary value problem in space for a quasi-linear system of fourth order equations of mixed type %J Doklady Akademii Nauk %D 1976 %P 785-788 %V 230 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1976_230_4_a8/ %G ru %F DAN_1976_230_4_a8