Gref, Patrick [P:(DE-Juel1)195709] ; Wollenhaupt, Bastian [P:(DE-Juel1)174568] ; Kohlheyer, Dietrich [P:(DE-Juel1)140195] ; Dusny, C. [P:(DE-HGF)0] ; Grünberger, Alexander [P:(DE-Juel1)143612]