- Author: Herbert Büning, Peter Naeve, Götz Trenkler, Karl-Heinz Waldmann
- Language: German
- Year: 2000
- Author: Herbert Büning, Götz Trenkler
- Language: German
- Year: 1998
- Author: Karsten Schmidt Götz Trenkler (auth.)
- Language: German
- Year: 2015
- Author: Prof. Dr. Karsten Schmidt Prof. Dr. Götz Trenkler (auth.)
- Language: German
- Year: 1998
- Author: Walter Krämer Götz Trenkler
- Language: German
- Year: 2003
- Author: Karsten Schmidt Götz Trenkler
- Language: German
- Year: 2006