@article {29046,
	title = {An adaptive algorithm for least squares piecewise monotonic data fitting},
	journal = {Computational Statistics and Data Analysis, 2nd Special Issue on Computational Econometrics},
	volume = {Vol. 49},
	year = {2005},
	pages = {591-609},
	author = {E.E. Vassiliou and I. C. Demetriou}
}
