@article{DE_1990_26_1_a26,
     author = {Choi Sung Bong},
     title = {A problem for harmonic functions with boundary values of a higher-order normal derivative},
     journal = {Differencialʹnye uravneni\^a},
     pages = {175--177},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_1_a26/}
}