Yoshinobu, T. [P:(DE-HGF)0] ; Ecken, H. [P:(DE-Juel1)VDB5501] ; Poghossian, A. [P:(DE-Juel1)VDB1267] ; Lüth, H. [P:(DE-Juel1)VDB975] ; Iwasaki, H. [P:(DE-HGF)0] ; Schöning, M. J. [P:(DE-Juel1)128727]