@article{1183502005,
author = {McEwen, W. H.},
title = {On the simultaneous approximation of a function and its derivatives by sums of Birkhoff type},
journal = {Bull. Amer. Math. Soc.},
volume = {45},
number = {11},
year = {1939},
pages = { 576-582},
language = {en},
url = {http://dml.mathdoc.fr/item/1183502005}
}
McEwen, W. H. On the simultaneous approximation of a function and its derivatives by sums of Birkhoff type. Bull. Amer. Math. Soc., Tome 45 (1939) no. 11, pp. 576-582. http://gdmltest.u-ga.fr/item/1183502005/