Weigl, M. [P:(DE-HGF)0] ; Grabner, M. [P:(DE-HGF)0] ; Helle, G. [P:(DE-Juel1)VDB3527] ; Schleser, G. H. [P:(DE-Juel1)VDB1420] ; Wimmer, R. [P:(DE-HGF)0]