Dammers, J. [P:(DE-Juel1)VDB261] ; Peters, H. [P:(DE-Juel1)VDB8707] ; Boers, F. [P:(DE-Juel1)VDB131] ; Ziemons, K. [P:(DE-Juel1)VDB1841] ; Fieseler, T. [P:(DE-Juel1)132100] ; Tass, P. A. [P:(DE-Juel1)131884] ; Zilles, K. [P:(DE-Juel1)131714]