@article{bwmeta1.element.desklight-e64eafc9-5e0c-42b5-8fa1-9b96313d342f,
author = {J. P\l onka},
title = {On discrete subspaces of a Hilbert space},
journal = {Colloquium Mathematicae},
volume = {38},
year = {1977},
pages = {53-64},
zbl = {0372.46023},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-e64eafc9-5e0c-42b5-8fa1-9b96313d342f}
}
J. Płonka. On discrete subspaces of a Hilbert space. Colloquium Mathematicae, Tome 38 (1977) pp. 53-64. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-e64eafc9-5e0c-42b5-8fa1-9b96313d342f/