%0 Journal Article %A A. V. Ivanov %T The first and second boundary value problems for $(A,\vec b)$-elliptic equations %J Zapiski Nauchnykh Seminarov POMI %D 1979 %P 171-181 %V 92 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZNSL_1979_92_a8/ %G ru %F ZNSL_1979_92_a8