Universität Kiel, Germany
Technische Universität Berlin, Germany
Universität Freiburg, Germany
Universität Dortmund, Germany
Max-Planck-Institute Saarbrücken, Germany
Université d'Evry, France
Université de Paris-Sud, France
Technical University of Athens, Greece
Athens University, Greece
Universita di Roma, Italy
Teach. Training College Szeged, Hungary
Maastricht University, Netherlands
Technion Haifa, Israel
Tel-Aviv University, Israel
ETH Zürich, Switzerland
Katholieke Universiteit Leuven, Belgium
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