1. The architecture of cognition;Andersen,1983
2. Acquisition of problem-solving skill;Anderson,1981
3. The development of mental arithmetic: A chronometric approach;Ashcraft;Developmental Review,1982
4. Activity, consciousness, and communication;Bakhurst;Quarterly Newsletter of the Laboratory of Comparative Human Cognition,1988
5. Cognitive versus situational analysis of problem-solving behavior;Balacheff;For the Learning of Mathematics,1986