1. Collection-oriented match: scaling up the data in production systems;Acharya,1992
2. Pengi: an implementation of a theory of activity;Agre,1987
3. B.P. Allen, Bringing up Soar in ART, in: Proceedings Seventh Soar Workshop.
4. E. Altmann, Toward human-scale task performance: a stage 4 learning system, Thesis proposal, School of Computer Science, Carnegie Mellon University, Pittsburgh, PA.