@article{1183500403,
author = {Risselman, W. C.},
title = {Approximation to a given function by means of polynomials in another given function},
journal = {Bull. Amer. Math. Soc.},
volume = {44},
number = {11},
year = {1938},
pages = { 241-249},
language = {en},
url = {http://dml.mathdoc.fr/item/1183500403}
}
Risselman, W. C. Approximation to a given function by means of polynomials in another given function. Bull. Amer. Math. Soc., Tome 44 (1938) no. 11, pp. 241-249. http://gdmltest.u-ga.fr/item/1183500403/