- Author: Hans-Joachim Veen
- Language: German
- Year: 2012
- Author: Hans-Joachim Veen, Volkhard Knigge, Ulrich Mählert, Franz-Josef Schlichting
- Language: German
- Year: 2011
- Author: Hans-Joachim Veen, Peter März, Franz-Josef Schlichting
- Language: German
- Year: 2010
- Author: Hans-Joachim Veen, Volkhard Knigge
- Language: German
- Year: 2014