ISI Document Delivery No.: 517IE Times Cited: 16 Cited Reference Count: 105 Duschek, Alexander Kirsch, Stefan E. Deutsche Forschungsgemeinschaft (DFG) This project was supported by the Deutsche Forschungsgemeinschaft (DFG). The authors thank Prof. Dr. T Bach for helpful ideas and great support. 16 Wiley-v c h verlag gmbh Weinheim