@article{bwmeta1.element.bwnjournal-article-fmv35i1p24,
author = {A. Offord},
title = {Approximation to functions by trigonometric polynomials},
journal = {Fundamenta Mathematicae},
volume = {35},
year = {1948},
pages = {259-270},
zbl = {0038.21801},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv35i1p24}
}
Offord, A. Approximation to functions by trigonometric polynomials. Fundamenta Mathematicae, Tome 35 (1948) pp. 259-270. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv35i1p24/