@article{Stone2005,
	title = {Nonparametric M-regression with free knot splines},
	author = {Charles J. Stone},
	day = {01},
	journal = {Journal of Statistical Planning and Inference},
	month = {Mar},
	number = {1-2},
	pages = {183--206},
	url = {http://www.sciencedirect.com/science/article/B6V0M-4D07T40-4/1/00a8b89734a17611de5410f44f7a3152},
	volume = {130},
	year = {2005},
	biburl = {http://www.bibsonomy.org/bibtex/2d26825ab083c69d91ccea0a27dbf730b/smicha},
	keywords = {Least absolute deviations }
}