1. Understanding work units and activities: a perspective from general psychology;Aboulafia;Interacting with Computers,2007
2. ‘Working Sphere’ or ‘Engagement’ and the concept of task in activity theory;Bedny;Interacting with Computers,2007
3. Social worlds/Arenas theory as organizational theory;Clarke,1991
4. Working Spheres or Engagements: Implications for Designing;Cockton;Interacting with Computers,2007
5. Missing links in the rhetoric of Activity Theory;de Souza;Interacting with Computers,2007