@article {29055,
	title = {Algorithm 863: L2WPMA: A Fortran 77 subroutine for weighted least squares piecewise monotonic data fitting},
	journal = {ACM Transactions on Mathematical Software},
	volume = {Vol. 33},
	year = {2007},
	pages = {1-19},
	author = {I. C. Demetriou}
}
