%0 Journal Article %A G. I. Èskin %T Boundary value problems and the parametrix for elliptic systems of pseudodifferential equations %J Trudy Moskovskogo matematičeskogo obŝestva %D 1973 %P 75-116 %V 28 %I mathdoc %U http://geodesic.mathdoc.fr/item/MMO_1973_28_a3/ %G ru %F MMO_1973_28_a3