@article{GDZPPN00229334X,
title = {Approximation Theorems for the Solution of Fourier's Problem and Dirichlet's Problem.},
journal = {Mathematische Annalen},
volume = {154},
year = {1964},
pages = {316-330},
zbl = {0178.12603},
url = {http://dml.mathdoc.fr/item/GDZPPN00229334X}
}
Butzer, P.L.; SUNOUCHI, G. Approximation Theorems for the Solution of Fourier's Problem and Dirichlet's Problem.. Mathematische Annalen, Tome 154 (1964) pp. 316-330. http://gdmltest.u-ga.fr/item/GDZPPN00229334X/