@article{GDZPPN002226006,
title = {Approximation of Ultra-Differentiable Functions by Polynomials and Entire Functions.},
journal = {Manuscripta mathematica},
volume = {46},
year = {1984},
pages = {227-250},
zbl = {0574.46018},
url = {http://dml.mathdoc.fr/item/GDZPPN002226006}
}
Petzsche, Hans-Joachim. Approximation of Ultra-Differentiable Functions by Polynomials and Entire Functions.. Manuscripta mathematica, Tome 46 (1984) pp. 227-250. http://gdmltest.u-ga.fr/item/GDZPPN002226006/