@article{00645168,
title = {On convergence subsystems of orthonormal systems.},
journal = {Georgian Mathematical Journal},
volume = {1},
year = {1994},
pages = {235-242},
doi = {10.1007/BF02254672},
zbl = {0811.42009},
language = {en},
url = {http://dml.mathdoc.fr/item/00645168}
}
Bareladze, G. On convergence subsystems of orthonormal systems.. Georgian Mathematical Journal, Tome 1 (1994) pp. 235-242. doi : 10.1007/BF02254672. http://gdmltest.u-ga.fr/item/00645168/