publications
- Luis Radford Educational Studies in Mathematics42(3):237-268(2000)
- Yasmin B. Kafai Lawrence Erlbaum Associates, Mahwah, NJ, (1995)
- Thomas Erickson Proceedings of the 3rd conference on Designing interactive systems: processes, practices, methods, and techniques, page 357-368. New York, NY, ACM Press, (2000)
- Joseph Bergin Proceedings of the Fifth European Conference on Pattern Languages of Programs, Irsee, Germany, (2000)
- Christopher Alexander and Sara Ishikawa and Murray Silverstein Oxford University Press, New York, August 1977.
- Yrjö Engeström Helsinki, (1987)
- Neil Harrison Proceedings of the 6th Annual Conference on the Pattern Languages of Programs PLoP, Monticello, Illinois, USA., August 15-18 1999.
- Susan Leigh Star Morgan Kaufmann Series In Research Notes In Artificial Intelligence(1990)
- Ann L. Brown The Journal Of the Learing Sciences(1992)
- Antony Bryant Proceedings of the 35th Hawaii International Conference on System Sciences, hicss, 08, page 253-263. Los Alamitos, CA, USA, IEEE Computer Society, (2002)


groups