@article{BGS06,
month={Sep},
year={2006},
issn={0006-3835},
journal={BIT Numerical Mathematics},
volume={46},
number={3},
doi={10.1007/s10543-006-0075-y},
title={Some observations on local least squares},
url={http://dx.doi.org/10.1007/s10543-006-0075-y},
publisher={Springer Netherlands},
keywords={subdivision; refinement; interpolation; approximation; least squares; projection; subspace angles; left inverse; B-splines},
author={Bartels, R. H. and Golub, G. H. and Samavati, F. F.},
pages={455-477},
language={English}
}