%0 Journal Article %A A. Dzhuraev %T Mutually adjoint boundary value problems for a system of three first order equations of composite type %J Doklady Akademii Nauk %D 1966 %P 258-261 %V 171 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1966_171_2_a3/ %G ru %F DAN_1966_171_2_a3