- Author: Peine Franz-Joseph, Knopp Lothar
- Language: German
- Year: 2011
- Author: Knopp Lothar, Wolff Heinrich Amadeus
- Language: German
- Year: 2016
- Author: Reinhold Knopp (editor), Karin Nell (editor)
- Language: German
- Year: 2015
- Author: Konrad Knopp
- Language: German
- Year: 1963
- Author: Konrad Knopp
- Language: German
- Year: 1955
- Author: Konrad Knopp
- Language: German
- Year: 1971
- Author: Konrad Knopp
- Language: German
- Year: 1966
- Author: Konrad Knopp
- Language: German
- Year: 1959