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2. Beale, R., & Lonsdale, P., (2004). Mobile context aware systems: The intelligence to support tasks and effectively utilise resources. Paper presented at the MobileHCI 2004.
3. Assisting construction: The role of the teacher in assisting the learner’s construction of pre-existing cultural knowledge;Becker,1995
4. Vygotsky: A historical and conceptual perspective;Bruner,1985
5. A historical view of context;Chalmers;Computer Supported Cooperative Work,2004