%0 Journal Article %A N. S. Nadirashvili %T Some estimates in a~problem with oblique derivative %J Izvestiya. Mathematics %D 1989 %P 403-411 %V 33 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_1989_33_2_a9/ %G en %F IM2_1989_33_2_a9