%0 Journal Article %A Choi Sung Bong %T A problem for harmonic functions with boundary values of a higher-order normal derivative %J Differencialʹnye uravneniâ %D 1990 %P 175-177 %V 26 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1990_26_1_a26/ %G ru %F DE_1990_26_1_a26