@article{1183425534,
author = {Kellogg, O. D.},
title = {Note on closure of orthogonal sets},
journal = {Bull. Amer. Math. Soc.},
volume = {27},
number = {9-10},
year = {1921},
pages = { 165-169},
language = {en},
url = {http://dml.mathdoc.fr/item/1183425534}
}
Kellogg, O. D. Note on closure of orthogonal sets. Bull. Amer. Math. Soc., Tome 27 (1921) no. 9-10, pp. 165-169. http://gdmltest.u-ga.fr/item/1183425534/