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2. Arnseth, H. C. (2004). Discourse and artefacts in learning to argue. Analysing the practical management of computer supported collaborative learning. PhD thesis. Institute of Educational Research, University of Oslo.
3. Klasseromssamtaler, deltagelsesstrukturer og læring (Classroom talk, participation structures, and learning);Aukrust,2001
4. Surpassing ourselves. An inquiry into the nature and implications of expertise;Bereiter,1993
5. Bergquist, K. (1990). Doing schoolwork. Task premisses and joint activity in the comprehensive classroom. Linköping University, Department of Communication Studies.