@article{1028999541, author = {Sibuya, Yasutaka}, title = {On biorthogonal systems.}, journal = {Michigan Math. J.}, volume = {13}, number = {1}, year = {1966}, pages = { 165-168}, language = {en}, url = {http://dml.mathdoc.fr/item/1028999541} }
Sibuya, Yasutaka. On biorthogonal systems.. Michigan Math. J., Tome 13 (1966) no. 1, pp. 165-168. http://gdmltest.u-ga.fr/item/1028999541/