@article{1028999976,
author = {Holmes, Richard and Kripke, Bernard},
title = {Smoothness of approximation.},
journal = {Michigan Math. J.},
volume = {15},
number = {1},
year = {1968},
pages = { 225-248},
language = {en},
url = {http://dml.mathdoc.fr/item/1028999976}
}
Holmes, Richard; Kripke, Bernard. Smoothness of approximation.. Michigan Math. J., Tome 15 (1968) no. 1, pp. 225-248. http://gdmltest.u-ga.fr/item/1028999976/