@inproceedings{HCI-CCAD-1999-VirvouM99a,
	author        = "Maria Virvou and Dimitris Maras",
	booktitle     = "{Proceedings of the Eighth International Conference on Human-Computer Interaction. Volume 2: Communication, Cooperation, and Application Design}",
	isbn          = "0-8058-3392-7",
	pages         = "657--661",
	publisher     = "{Lawrence Erlbaum}",
	title         = "{Error diagnosis in an English tutor}",
	year          = 1999,
}