@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/}
}