@article{1256053436,
author = {Ahern, P. R.},
title = {Approximation to harmonic functions},
journal = {Illinois J. Math.},
volume = {13},
number = {4},
year = {1969},
pages = { 757-760},
language = {en},
url = {http://dml.mathdoc.fr/item/1256053436}
}
Ahern, P. R. Approximation to harmonic functions. Illinois J. Math., Tome 13 (1969) no. 4, pp. 757-760. http://gdmltest.u-ga.fr/item/1256053436/