%0 Journal Article %A Q. T. Hoang %T Some nonelliptic boundary value problems for a system of Bicadze equations %J Differencialʹnye uravneniâ %D 1979 %P 2282-2285 %V 15 %N 12 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1979_15_12_a23/ %G ru %F DE_1979_15_12_a23