- Author: Hans-Georg Weigand et al.
- Language: German
- Year: 2018
- Author: Günter Krauthausen (auth.)
- Language: German
- Year: 2018
- Author: Friedhelm Padberg Sebastian Wartha (auth.)
- Language: German
- Year: 2017
- Author: Berthold Schuppar (auth.)
- Language: German
- Year: 2017
- Author: Friedhelm Käpnick Friedhelm Padberg
- Language: German
- Year: 2013
- Author: Kirsten Heckmann Friedhelm Padberg
- Language: German
- Year: 2014
- Author: Markus Helmerich Katja Lengnink
- Language: German
- Year: 2015
- Author: Timo Leuders
- Language: German
- Year: 2016
- Author: Friedhelm Padberg Andreas Büchter (auth.)
- Language: German
- Year: 2015