@conference {29028,
	title = {Best characterization of the least squares convex-concave approximation to discrete data (Άριστος χαρακτηρισμός της κυρτής-κοίλης προσέγγισης ελαχίστων τετραγώνων σε διακριτά δεδομένα)},
	booktitle = {Proceedings of the 11th Hellenic Conference on Statistics, Chania, Greek Statistical Institute, May 1998},
	year = {1998},
	pages = {55-65},
	author = {I. C. Demetriou}
}
