Herrmann, Thomas; Hoffmann, Marcel; Kunau, Gabriele; Loser, Kai-Uwe (2002): Modelling Cooperative Work: Chances and Risks of Structuring. COOP 2002: Cooperative Systems Design - A Challenge of the Mobility Age. IOS Press. ISBN: 1-58603-244-5. Tools and Techniques for Cooperative Systems Design. Saint-Raphaël, France. 4-7 June 2002