Volkel, S. [P:(DE-Juel1)162499] ; Heil, R. [P:(DE-Juel1)145688] ; Schiek, M. [P:(DE-Juel1)145429] ; Schlosser, M. [P:(DE-Juel1)133936] ; Silex, W. [P:(DE-Juel1)145880] ; van Waasen, S. [P:(DE-Juel1)142562]