Ansorge, Rainer (universitat Hamburg, Oberle, Hans Joachim (universit¿t Hamburg, Rothe, Kai (universitat Hamburg, Sonar, Thomas (universitat Braunschweig (2) Tieke, Bernd (university Of Cologne (1) Beck, Hanno, Prinz, Aloys (1) Nelson, Bob, Economy, Peter (1) Karre, Avinashkumar V. (1)