%0 Journal Article %A A. K. Gushchin %T On the Existence of $L_2$ Boundary Values of Solutions to an Elliptic Equation %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2019 %P 56-74 %V 306 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2019_306_a5/ %G ru %F TM_2019_306_a5