@article {SC.4.Lyche.2002,
	title = {Preconditioned Iterative Methods for Scattered Data Interpolation},
	journal = {Advances in Computational Mathematics},
	volume = {17},
	year = {2002},
	pages = {237-256},
	author = {Lyche, T. and Nilssen, Trygve Kastberg and Winther, Ragnar}
}
