Dahmen, K. [P:(DE-Juel1)VDB5680] ; Giesen, M. [P:(DE-Juel1)4744] ; Ikonomov, K. [P:(DE-Juel1)VDB7599] ; Ibach, H. [P:(DE-Juel1)VDB5414] ; Starbova, K. [P:(DE-Juel1)VDB5995]