@article{03888157,
title = {Integrability of derivations of classical solutions of Dirichlet's problem for an elliptic equation.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {7},
year = {1984},
pages = {279-282},
doi = {10.1155/S0161171284000284},
zbl = {0557.35038},
language = {en},
url = {http://dml.mathdoc.fr/item/03888157}
}
Hassan, M.I. Integrability of derivations of classical solutions of Dirichlet's problem for an elliptic equation.. International Journal of Mathematics and Mathematical Sciences, Tome 7 (1984) pp. 279-282. doi : 10.1155/S0161171284000284. http://gdmltest.u-ga.fr/item/03888157/