Zhang-Haagen, Bo [P:(DE-HGF)0] ; Biehl, Ralf [P:(DE-Juel1)130542] ; Nagel-Steger, Luitgard [P:(DE-Juel1)162443] ; Radulescu, Aurel [P:(DE-Juel1)130905] ; Richter, Dieter [P:(DE-Juel1)130917] ; Willbold, Dieter [P:(DE-Juel1)132029]