%0 Journal Article %A V. A. Solonnikov %A E. V. Frolova %T A~problem with the third boundary condition for the Laplace equation in a~plane angle and its applications to parabolic problems %J Algebra i analiz %D 1990 %P 213-241 %V 2 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/AA_1990_2_4_a7/ %G ru %F AA_1990_2_4_a7