Dado, AdibDalil, MohamedDrobiazko, IgorEckstein, JensEngler, UlrichKölling, DanielaKrümpelmann, PatrickRüther, DennisSentürk, ÖzlemThimm, MatthiasTittel, StefanVorderstemann, Max2007-07-312007-07-312007-07-31http://hdl.handle.net/2003/2452310.17877/DE290R-8181de004study thesis