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@article{JRAM_1971__246_151080, author = {J.R. Holub and J.R. Retherford}, title = {The stability of bases in {Banach} and {Hilbert} spaces.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {136--146}, publisher = {mathdoc}, volume = {246}, year = {1971}, zbl = {0207.12101}, url = {http://geodesic.mathdoc.fr/item/JRAM_1971__246_151080/} }
J.R. Holub; J.R. Retherford. The stability of bases in Banach and Hilbert spaces.. Journal für die reine und angewandte Mathematik, Tome 246 (1971), pp. 136-146. http://geodesic.mathdoc.fr/item/JRAM_1971__246_151080/