Rietz, M. [P:(DE-HGF)0] ; Hundhausen, Alexander [P:(DE-Juel1)161415] ; Allelein, Hans-Josef [P:(DE-Juel1)130314] ; Belt, Alexander [P:(DE-Juel1)138417] ; Garbrecht, O. [P:(DE-HGF)0] ; Kneer, R. [P:(DE-HGF)0] ; Rohlfs, W. [P:(DE-HGF)0]