@article{10_1017_S0017089505002788,
     author = {HOLUB, JAMES R.},
     title = {ALMOST-ORTHONORMAL {BASES} {FOR} {HILBERT} {SPACE}},
     journal = {Glasgow mathematical journal},
     pages = {563--566},
     year = {2005},
     volume = {47},
     number = {3},
     doi = {10.1017/S0017089505002788},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089505002788/}
}