- Author: Christoph Mayer, Sören Jensen, Suleika Bort
- Language: German
- Year: 2023
- Author: Christoph Mayer Carsten Weber David Francas (auth.)
- Language: German
- Year: 2017
- Author: Christoph Mayer Carsten Weber David Francas
- Language: German
- Year: 2017
- Author: Dipl.-Kfm. Christoph Mayer Dipl.-Kfm. Carsten Weber (auth.)
- Language: German
- Year: 2004
- Author: Christoph Mayer Carsten Weber David Francas (auth.)
- Language: German
- Year: 2011
