%0 Journal Article %A S. A. Brykalov %T Properties of some plane sets, and boundary value problems %J Differencialʹnye uravneniâ %D 1995 %P 739-746 %V 31 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1995_31_5_a0/ %G ru %F DE_1995_31_5_a0