1. Multiple representations of knowledge for tutorial reasoning;Brown,1975
2. Diagnostic models for procedural bugs in basic mathematical skills;Brown;Cognitive Science,1978
3. A tutoring and student modeling paradigm for gaming environments;Burton,1976
4. Overlays: A theory of modeling for computer aided instruction;Carr,1977
5. Tutoring rules for guiding a case method dialogue;Clancey;International Journal of Man-Machine Studies,1979