- Intelligent Tutoring Systems, volume 2363 of Lecture Notes in Computer Science, page 178-187. Springer, (2002)
- AISMC, volume 1138 of Lecture Notes in Computer Science, page 274-288. Springer, (1996)
- Constraints 4(4):383-405 (1999)
- (2007)
- Workshop on Usage Analysis in Learning Systems, Proceedings of Artificial Intelligence in Education, Amsterdam, (2005)
- Intelligent Tutoring Systems, volume 1086 of Lecture Notes in Computer Science, page 333-342. Springer, (1996)


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