- ACII 1, volume 6974 of Lecture Notes in Computer Science, page 175-184. Springer, (2011)
- ITiCSE, page 156-160. ACM, (2009)
- Intelligent Tutoring Systems, volume 5091 of Lecture Notes in Computer Science, page 40-49. Springer, (2008)
- AIED, volume 158 of Frontiers in Artificial Intelligence and Applications, page 145-152. IOS Press, (2007)


author