@article{bwmeta1.element.bwnjournal-article-smv5i1p4bwm,
author = {S. Kaczmarz},
title = {Notes on orthogonal series I},
journal = {Studia Mathematica},
volume = {5},
year = {1934},
pages = {24-28},
zbl = {0010.25702},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-smv5i1p4bwm}
}
Kaczmarz, S. Notes on orthogonal series I. Studia Mathematica, Tome 5 (1934) pp. 24-28. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-smv5i1p4bwm/