@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/