@article{GDZPPN002539632,
title = {On the approximation of continuosly diffentialble functions in Hilbert spaces},
journal = {Revista colombiana de matematicas},
volume = {8},
year = {1974},
pages = {217-224},
zbl = {0293.41032},
url = {http://dml.mathdoc.fr/item/GDZPPN002539632}
}
Lesmes, Jaime. On the approximation of continuosly diffentialble functions in Hilbert spaces. Revista colombiana de matematicas, Tome 8 (1974) pp. 217-224. http://gdmltest.u-ga.fr/item/GDZPPN002539632/