- Author: Michael Lommel (editor), Isabel Maurer Queipo (editor), Volker Roloff (editor)
- Language: German
- Year: 2015
- Author: Michael Lommel (editor), Volker Roloff (editor)
- Language: German
- Year: 2015
- Author: Uta Felten (editor), Volker Roloff (editor)
- Language: German
- Year: 2015