@article{GMJ_1999__6_1_48248,
     author = {Dzagnidze, O.},
     title = {A radial derivative with boundary values of the spherical {Poisson} integral.},
     journal = {Georgian mathematical journal},
     pages = {19--32},
     year = {1999},
     volume = {6},
     number = {1},
     zbl = {0922.33008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/GMJ_1999__6_1_48248/}
}