@article{2807,
author = {Hsiang, Fu Cheng},
title = {On the absolute convergence factors of an orthogonal series},
journal = {Portugaliae mathematica},
volume = {36},
year = {1977},
pages = {13-15},
zbl = {0407.42010},
mrnumber = {0535218},
language = {en},
url = {http://dml.mathdoc.fr/item/2807}
}
Hsiang, Fu Cheng. On the absolute convergence factors of an orthogonal series. Portugaliae mathematica, Tome 36 (1977) pp. 13-15. http://gdmltest.u-ga.fr/item/2807/