Designing educational technology, Context and Consciousness, pp.123-146, 1996. ,
Applying Activity Theory to video analyis: how to make sense of video data in human-computer interaction Context and Consciousness, pp.147-174, 1996. ,
ARI-LAB: Models, issues and strategies in the design of a multiple-tools problem solving environment, Instructional Science, vol.33, issue.3, pp.1-3, 1995. ,
DOI : 10.1007/BF00890443
A hypermedia system for interactive problem solving in arithmetic, Journal of Educational Multimedia and Hypermedia AACE, vol.3, issue.34, pp.307-326, 1994. ,
A cultural-historical approach to distributed cognition, Distributed Cognition, pp.1-47, 1991. ,
Learning by expanding, pp.Orienta-consultit, 1987. ,
DOI : 10.1017/CBO9781139814744
Activity Theory as potential framework for Human Computer Interaction research, Context and Consciouness, pp.17-44, 1996. ,
The problem of activity in psychology, Soviet Psychology, vol.13, issue.1, pp.4-33, 1974. ,
Activity. Consciousness. Personality, 1978. ,
Computers as a Trigger for Change, 1996. ,
International Perspectives on the Desing of Technology-Supported Learning Environments, pp.363-377 ,
Rousing mind to life. Teaching, learning and schooling in social context, 1989. ,