Wendland, F. [P:(DE-Juel1)VDB4997] ; Hannappel, S. [P:(DE-Juel1)VDB15267] ; Kunkel, R. [P:(DE-Juel1)VDB4996] ; Voigt, H. J. [P:(DE-Juel1)VDB27923] ; Wolter, R. [P:(DE-Juel1)VDB27924]