@article {29087,
	title = {Piecewise monotonic data approximation: Spline representation and linear model - Basic Statistics},
	journal = {IAENG International Journal of Applied Mathematics},
	volume = {Vol. 52},
	year = {2022},
	pages = {238-245},
	author = {E.E. Vassiliou and I. C. Demetriou}
}
