@article{1028989861,
author = {Dieudonn\'e, Jean},
title = {On biorthogonal systems.},
journal = {Michigan Math. J.},
volume = {2},
number = {1},
year = {1953},
pages = { 7-20},
language = {en},
url = {http://dml.mathdoc.fr/item/1028989861}
}
Dieudonné, Jean. On biorthogonal systems.. Michigan Math. J., Tome 2 (1953) no. 1, pp. 7-20. http://gdmltest.u-ga.fr/item/1028989861/