- Author: Tanja Polep, Hartmut Rensen
- Language: German
- Year: 2004
- Author: Hartmut Rensen, Wolfgang Büscher
- Language: German
- Year: 2023
- Author: Hartmut Rensen, Wolfgang Büscher
- Language: German
- Year: 2023
- Author: David-Christoph Bittmann, Hartmut Rensen, Christoph Schreiber, Andreas Wax
- Language: German
- Year: 2014
- Author: Wolfgang Büscher, Hartmut Rensen, Rolf A. Schütze
- Language: German
- Year: 2015
- Author: Hartmut Rensen, Wolfgang Büscher, Rolf A. Schütze, Hans-Günther Borck
- Language: German
- Year: 2007
- Author: David-Christoph Bittmann, Hartmut Rensen, Christoph Schreiber, Andreas Wax
- Language: German
- Year: 2014
- Author: Wolfgang Büscher, Hartmut Rensen, Rolf A. Schütze
- Language: German
- Year: 2015
- Author: Hartmut Rensen Stefan Brink
- Language: German
- Year: 2009