1. Work, workers and work measurements;Abruzzi,1956
2. Social processes and computing. Unpublished paper;Allen,1987
3. Intelligent tutoring systems;Anderson;Science,1985
4. Learning to program in LISP;Anderson;Cognitive Science,1984
5. Novice LISP errors: Undetected losses of information from working memory;Anderson;Human-Computer Interaction,1985