Butzek, D. P. [P:(DE-Juel1)VDB4096] ; Bajus, J. [P:(DE-Juel1)VDB26057] ; Hanslik, R. [P:(DE-Juel1)VDB4102] ; Kulessa, T. [P:(DE-Juel1)VDB26056] ; Lüdeke, M. [P:(DE-Juel1)VDB16570] ; Müller, A. [P:(DE-Juel1)VDB1103]