1. Koedinger, K.R., et al.: Intelligent Tutoring Goes To School in the Big City. International Journal of Artificial Intelligence in Education 8, 30–43 (1997)
2. Bloom, B.S.: Human characteristics and school learning. McGraw-Hill (1976)
3. Frick, T.W.: A comparison of three decision models for adapting the length of computer-based mastery tests. Journal of Educational Computing Research 6(4), 479–513 (1990)
4. Corbett, A., Anderson, J.R.: Knowledge tracing: Modeling the acquisition of procedural knowledge. User Modeling and User-Adapted Interaction 4, 253–278 (1995)
5. Beck, J.E., Chang, K.-M.: Identifiability: A Fundamental Problem of Student Modeling. In: International Conference on User Modeling, Corfu, Greece (2007)