Schafbauer, W. [P:(DE-Juel1)VDB76694] ; Ivanova, M. [P:(DE-Juel1)129617] ; Meulenberg, W.A. [P:(DE-Juel1)129637] ; Buchkremer, H.P. [P:(DE-Juel1)129594] ; Stöver, D. [P:(DE-Juel1)129666]