1. Lecture Notes in Computer Science;V. Aleven,2004
2. Lecture Notes in Computer Science;T. Barnes,2008
3. Barnes, T., Stamper, J., Lehmann, L., Croy, M.: A Pilot Study on Logic Proof Tutoring Using Hints Generated from Historical Student Data. In: Baker, R., Barnes, T., Beck, J. (eds.) Educational Data Mining (EDM 2008), Montreal, Canada, pp. 197–201 (2008)
4. Lecture Notes in Computer Science;J.E. Beck,2008
5. Croy, M., Barnes, T., Stamper, J.: Towards an Intelligent Tutoring System for propositional proof construction. In: Brey, P., Briggle, A., Waelbers, K. (eds.) European Computing and Philosophy Conference, pp. 145–155. IOS Publishers, Amsterdam (2007)