- Author: Helmut König (editor), Manfred Sicking (editor)
- Language: German
- Year: 2015
- Author: Elke Ariëns (editor), Helmut König (editor), Manfred Sicking (editor)
- Language: German
- Year: 2014
- Author: Helmut König (editor), Manfred Sicking (editor)
- Language: German
- Year: 2015
- Author: Helmut König (editor), Emanuel Richter (editor), Sabine Schielke (editor)
- Language: German
- Year: 2015
- Author: Winfried Brömmel (editor), Helmut König (editor), Manfred Sicking (editor)
- Language: German
- Year: 2015