@article{1183425725,
author = {Jackson, Dunham},
title = {The general theory of approximation by polynomials and trigonometric sums},
journal = {Bull. Amer. Math. Soc.},
volume = {27},
number = {9-10},
year = {1921},
pages = { 415-431},
language = {en},
url = {http://dml.mathdoc.fr/item/1183425725}
}
Jackson, Dunham. The general theory of approximation by polynomials and trigonometric sums. Bull. Amer. Math. Soc., Tome 27 (1921) no. 9-10, pp. 415-431. http://gdmltest.u-ga.fr/item/1183425725/