@article{DAN_1971_198_5_a2,
     author = {O. P. Dzagnidze},
     title = {On some boundary properties of functions harmonic in a sphere},
     journal = {Doklady Akademii Nauk},
     pages = {1005--1006},
     publisher = {mathdoc},
     volume = {198},
     number = {5},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_198_5_a2/}
}