- Author: Marius van der Put Michael F. Singer
- Language: German
- Year: 2003
- Author: Marius van der Put Michael F. Singer
- Language: English
- Year: 2003
- Author: Marius Van Der Put Michael F. Singer
- Language: English
- Author: Marius van der Put Michael F. Singer
- Language: English
- Year: 2002
- Author: Marius van der Put Michael F. Singer (auth.)
- Language: English
- Year: 1997
- Author: Marius van der Put Michael F. Singer
- Language: German
- Year: 2003
- Author: Marius van der Put Michael F. Singer
- Language: English
- Year: 2003
- Author: Marius van der Put Michael F. Singer (auth.)
- Language: English
- Year: 1997