- Intelligent Tutoring Systems, volume 3220 of Lecture Notes in Computer Science, page 368-379. Springer, (2004)
- Intelligent Tutoring Systems, volume 3220 of Lecture Notes in Computer Science, page 521-530. Springer, (2004)
- CICLing, volume 3406 of Lecture Notes in Computer Science, page 704-714. Springer, (2005)
- Proceedings of the HLT-NAACL 03 workshop on Building educational applications using natural language processing - Volume 2, page 68--75. Stroudsburg, PA, USA, Association for Computational Linguistics, (2003)
- (2003)
- Int. J. Artif. Intell. Ed. (April 2006)
- Intelligent Tutoring Systems, volume 2363 of Lecture Notes in Computer Science, page 552-561. Springer, (2002)
- Intelligent Tutoring Systems, volume 2363 of Lecture Notes in Computer Science, page 158-167. Springer, (2002)
- I. J. Artificial Intelligence in Education 16(2):145-170 (2006)
- FLAIRS Conference, page 566-571. AAAI Press, (2005)
- HLT-NAACL, (2003)


author