Esser, R. [P:(DE-Juel1)VDB4614] ; Docter, Jutta [P:(DE-Juel1)132083] ; Scholtyssik, K. [P:(DE-Juel1)VDB4059] ; Krotz, R. [P:(DE-HGF)0] ; Erkens, W. [P:(DE-Juel1)VDB6556] ; Striegnitz, J. [P:(DE-Juel1)VDB1977] ; Wolf, F. [P:(DE-Juel1)VDB1927] ; Gutheil, I. [P:(DE-Juel1)132120] ; Dachsel, H. [P:(DE-Juel1)132079] ; Müller, T. [P:(DE-Juel1)132204]