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@article{MAN_1971__193_182718, author = {Ivan SINGER}, title = {On {Biorthogonal} {Systems} and {Total} {Sequences} of {Functionals.}}, journal = {Mathematische Annalen}, pages = {183--188}, publisher = {mathdoc}, volume = {193}, year = {1971}, zbl = {0207.43004}, url = {http://geodesic.mathdoc.fr/item/MAN_1971__193_182718/} }
Ivan SINGER. On Biorthogonal Systems and Total Sequences of Functionals.. Mathematische Annalen, Tome 193 (1971), pp. 183-188. http://geodesic.mathdoc.fr/item/MAN_1971__193_182718/