@article{1177729956,
author = {Sard, Arthur},
title = {Smoothest Approximation Formulas},
journal = {Ann. Math. Statist.},
volume = {20},
number = {4},
year = {1949},
pages = { 612-615},
language = {en},
url = {http://dml.mathdoc.fr/item/1177729956}
}
Sard, Arthur. Smoothest Approximation Formulas. Ann. Math. Statist., Tome 20 (1949) no. 4, pp. 612-615. http://gdmltest.u-ga.fr/item/1177729956/