- Author: Fertig Michael, Kluve Jochen, Schmidt Christoph M., Apel Helmut, Friedrich Werner, Hägele Helmut
- Language: German
- Year: 2004
- Author: Torsten Bleich, Meik Friedrich, Werner A. Halver, Christof Römer, Michael Vorfeld
- Language: German
- Year: 2016
- Author: Torsten Bleich, Meik Friedrich, Werner A. Halver, Christof Römer, Michael Vorfeld
- Language: German
- Year: 2016
- Author: Hans Popper (auth.) Professor Dr. Gorig Brunner Professor Dr. Friedrich Werner Schmidt (eds.)
- Language: English
- Year: 1981