@article{GDZPPN002288303,
title = {On best Approximation of Continuous Functions.},
journal = {Mathematische Annalen},
volume = {141},
year = {1960},
pages = {165-168},
zbl = {0092.11601},
url = {http://dml.mathdoc.fr/item/GDZPPN002288303}
}
SINGER, I. On best Approximation of Continuous Functions.. Mathematische Annalen, Tome 141 (1960) pp. 165-168. http://gdmltest.u-ga.fr/item/GDZPPN002288303/