Blömers, Ch. [P:(DE-Juel1)125566] ; Lepsa, M. I. [P:(DE-Juel1)128603] ; Luysberg, M. [P:(DE-Juel1)130811] ; Grützmacher, D. [P:(DE-Juel1)125588] ; Lüth, H. [P:(DE-Juel1)128608] ; Schäpers, Th. [P:(DE-Juel1)128634]