Intelligent tutoring systems: 7th International Conference, ITS 2004, Maceió, Alagoas, Brazil, August 30 - September 3, 2004. Proceedings
Lester, James C ; Vicari, Rosa Maria ; Paraguacu, Fábio Paraguaçu, Fábio ; Lester, James C. ; Vicari, Rosa Maria
Berlin, Heidelberg: Springer 2004
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