Cao, Y.; Ehms, K.; Fiedler, S.; Hofer, M.; Kaiamo, A.-K.; Kieslinger, B.; Klamma, R.; Krause, B.; Kravcik, M.; Ryyppö, T.; Spaniol, M.; Stumme, G. & Wild, F. (2007), 'Case study on social software use in distributed working environments' , Deliverable 15.2, European Network of Excellence ``Prolearn - Professional E-Learning'' .
Cao, Y.; Ehms, K.; Fiedler, S.; Hofer, M.; Kaiamo, A.-K.; Kieslinger, B.; Klamma, R.; Krause, B.; Kravcik, M.; Ryyppö, T.; Spaniol, M.; Stumme, G. & Wild, F. (2007), 'Case study on social software use in distributed working environments' , Deliverable 15.2, European Network of Excellence ``Prolearn - Professional E-Learning'' .