- Author: Dr. iur. Peter Katko (auth.)
- Language: German
- Year: 1999
- Author: RA Peter Katko (auth.)
- Language: German
- Year: 1997
- Author: Peter Katko (auth.)
- Language: German
- Year: 1995
- Author: Dr. iur. Peter Katko (auth.)
- Language: German
- Year: 2004
- Author: Dr. iur. Peter Katko (auth.)
- Language: German
- Year: 2002
- Author: Dr. iur. Peter Katko (auth.)
- Language: German
- Year: 2006