%0 Journal Article %A I. V. Skrypnik %T Regularity of a~boundary point for a~quasi-linear elliptic equation of higher order %J Informatics and Automation %D 1991 %P 310-321 %V 200 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_1991_200_a28/ %G ru %F TRSPY_1991_200_a28