@article{01106850, title = {Boundary properties of first-order partial derivatives of the Poisson integral for the half-space }, journal = {Georgian Mathematical Journal}, volume = {4}, year = {1997}, pages = {585-600}, doi = {10.1023/A:1022163710884}, zbl = {0888.31002}, language = {en}, url = {http://dml.mathdoc.fr/item/01106850} }
Topuria, S. Boundary properties of first-order partial derivatives of the Poisson integral for the half-space . Georgian Mathematical Journal, Tome 4 (1997) pp. 585-600. doi : 10.1023/A:1022163710884. http://gdmltest.u-ga.fr/item/01106850/