%0 Journal Article %A N. V. Bagotskaya %T Nonessential sets of the Dirichlet problem %J Differencialʹnye uravneniâ %D 1984 %P 279-288 %V 20 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1984_20_2_a11/ %G ru %F DE_1984_20_2_a11