%0 Journal Article %A G. I. Èskin %T Elliptic pseudodifferential operators with a~first order degeneracy in the space variables %J Trudy Moskovskogo matematičeskogo obŝestva %D 1971 %P 83-118 %V 25 %I mathdoc %U http://geodesic.mathdoc.fr/item/MMO_1971_25_a3/ %G ru %F MMO_1971_25_a3