@article{GDZPPN002196956,
title = {Polynomial approximation of differentiable functions on Banach spaces.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {316},
year = {1980},
pages = {195-216},
zbl = {0413.41022},
url = {http://dml.mathdoc.fr/item/GDZPPN002196956}
}
Aron, R.M.; Prolla, J.B. Polynomial approximation of differentiable functions on Banach spaces.. Journal für die reine und angewandte Mathematik, Tome 316 (1980) pp. 195-216. http://gdmltest.u-ga.fr/item/GDZPPN002196956/