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@article{RCM_1974__8_181626, author = {Jaime Lesmes}, title = {On the approximation of continuosly diffentialble functions in {Hilbert} spaces}, journal = {Revista colombiana de matematicas}, pages = {217--224}, publisher = {mathdoc}, volume = {8}, year = {1974}, zbl = {0293.41032}, url = {http://geodesic.mathdoc.fr/item/RCM_1974__8_181626/} }
Jaime Lesmes. On the approximation of continuosly diffentialble functions in Hilbert spaces. Revista colombiana de matematicas, Tome 8 (1974), pp. 217-224. http://geodesic.mathdoc.fr/item/RCM_1974__8_181626/