- Author: Sabine Dabringhaus
- Language: German
- Year: 2015
- Author: Erich Meuthen, Claudia Märtl
- Language: German
- Year: 2012
- Author: Manfred Hildermeier
- Language: German
- Year: 2007
- Author: Steven Vanderputten
- Language: English
- Year: 2020
- Author: Erich Meuthen
- Language: German
- Year: 2010
- Author: Christoph Ulf, Erich Kistler
- Language: German
- Year: 2019
- Author: Werner Dahlheim
- Language: German
- Year: 2003
- Author: Manfred Berg
- Language: German
- Year: 2013
- Author: Gregor Schöllgen, Friedrich Kießling
- Language: German
- Year: 2009
- Author: Alfred Kohler
- Language: German
- Year: 2011