- Author: Karl Baier, Regina Polak, Ludger Schwienhorst-Schönberger
- Language: German
- Year: 2013
- Author: Ludger Schwienhorst-Schönberger
- Language: German
- Year: 2023
- Author: Ludger Schwienhorst-Schönberger
- Language: German
- Year: 1990
- Author: Ludger Schwienhorst-Schönberger (editor)
- Language: German
- Year: 1997
- Author: Alexander Dietz Jan Dochhorn Axel Bernd Kunze Ludger Schwienhorst-Schönberger
- Language: German
- Year: 2020
- Author: Ludger Schwienhorst-Schönberger Ruth Scoralick Ilse Müllner
- Language: German
- Year: 2012
- Author: Ludger Schwienhorst-Schönberger
- Language: German
- Year: 1990
- Author: Ludger Schwienhorst-Schönberger
- Language: German
- Year: 1997