In: International Journal on Cooperative Information Systems (IJCIS), Special issue on Selected Best Papers of CIA 2002, Vol. 11, Pages 201-204, World …
In: Jürgen Dassow; Maia Hoeberechts; Helmut Jürgensen; Detlef Wotschke (Hrsg.). Proceedings of the 4th Workshop on Descriptional Complexity of Formal …