- Author: Esther Gardei, Michael Schulz, Hans-Georg Soeffner
- Language: German
- Year: 2023
- Author: Hans-Georg Soeffner
- Language: English
- Year: 2018
- Author: Hans-Georg Soeffner
- Language: German
- Year: 2019
- Author: Dr. disc. pol. Thea D. Boldt (auth.) Hans-Georg Soeffner Thea D. Boldt (eds.)
- Language: German
- Year: 2014
- Author: Hans-Ceorg Soeffner (auth.) Hans-Georg Soeffner (eds.)
- Language: German-English
- Year: 2010