@article {29029,
	title = {Measuring the smoothing performance of least squares approximation by non-negative divided differences},
	journal = {HERMIS - $\mu\pi$ Intl. Journal},
	volume = {Vol. 2},
	year = {2001},
	pages = {115-131},
	author = {I. C. Demetriou and EA Lipitakis}
}
