@inproceedings{HCI-NT-2009-AsteriadisKK,
	author        = "Stylianos Asteriadis and Kostas Karpouzis and Stefanos D. Kollias",
	booktitle     = "{Proceedings of the 13th International Conference on Human-Computer Interaction. Part I: New Trends}",
	doi           = "10.1007/978-3-642-02574-7_3",
	isbn          = "978-3-642-02573-0",
	pages         = "22--29",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Feature Extraction and Selection for Inferring User Engagement in an HCI Environment}",
	volume        = 5610,
	year          = 2009,
}