Eichhorn, R. [P:(DE-Juel1)VDB22203] ; Esser, F. [P:(DE-Juel1)VDB1978] ; Laatsch, B. [P:(DE-Juel1)VDB29117] ; Schug, G. [P:(DE-Juel1)VDB1476] ; Singer, H. [P:(DE-Juel1)VDB5271] ; Stassen, R. [P:(DE-Juel1)131342]