- Author: Norbert Köhler, Anton Bigalke, Gabriele Ledworuski, Horst Kuschnerow
- Language: German
- Year: 2018
- Author: Horst Kuschnerow Gabriele Ledworuski
- Language: German
- Year: 2018
- Author: Gabriele Ledworuski Horst Kuschnerow
- Language: German
- Year: 2016
- Author: Horst Kuschnerow Gabriele Ledworuski
- Language: German
- Year: 2018