%0 Book Section %B Intelligent Interactive Systems in Knowledge-Based Environments %D 2008 %T On Developing and Communicating User Models for Distance Learning Based on Assignment and Exam Data %A Hadzilacos, Thanasis %A Kalles, Dimitris %A Christos J. Pierrakeas %B Intelligent Interactive Systems in Knowledge-Based Environments %I Springer %P 137–155 %G eng %0 Book Section %B Advances in Artificial Intelligence %D 2006 %T On small data sets revealing big differences %A Hadzilacos, Thanasis %A Kalles, Dimitris %A Christos J. Pierrakeas %A Xenos, Michalis %B Advances in Artificial Intelligence %I Springer %P 512–515 %G eng