Callsen, M. [P:(DE-Juel1)142375] ; Caciuc, V. [P:(DE-Juel1)130583] ; Kiselev, N. [P:(DE-Juel1)145390] ; Atodiresei, N. [P:(DE-Juel1)130513] ; Blügel, Stefan [P:(DE-Juel1)130548]