Müller, R. [P:(DE-Juel1)129138] ; Schmidt, U. [P:(DE-Juel1)VDB1434] ; Engel, A. [P:(DE-Juel1)VDB352] ; MacKenna, A. R. [P:(DE-Juel1)VDB1037] ; Proffitt, M. H. [P:(DE-HGF)0]