- Author: Gerald Schenk (auth.)
- Language: German
- Year: 2018
- Author: Christian Ernst Christian Riegler Gerald Schenk (auth.)
- Language: German
- Year: 2014
- Author: Prof. Dr. Gerald Schenk (auth.)
- Language: German
- Year: 2005
- Author: Dr. Christian Ernst Professor Dr. Christian Riegler Professor Dr. Gerald Schenk (auth.)
- Language: German
- Year: 2003
- Author: Dipl.-Kfm. Christian Ernst Dr. Christian Riegler Dr. Gerald Schenk (auth.)
- Language: German
- Year: 1998