@article{1183493358,
author = {Walsh, J. L.},
title = {The approximation of harmonic functions by harmonic polynomials and by harmonic rational functions},
journal = {Bull. Amer. Math. Soc.},
volume = {35},
number = {6},
year = {1929},
pages = { 499-544},
language = {en},
url = {http://dml.mathdoc.fr/item/1183493358}
}
Walsh, J. L. The approximation of harmonic functions by harmonic polynomials and by harmonic rational functions. Bull. Amer. Math. Soc., Tome 35 (1929) no. 6, pp. 499-544. http://gdmltest.u-ga.fr/item/1183493358/