- Author: Frenzel Michael
- Language: German
- Year: 1978
- Author: Falk Richard
- Language: German
- Year: 2020
- Author: Fichte Johann Gottlieb
- Language: German
- Year: 1998
- Author: Joseph R. McElrath (editor), Robert C. Leitz (editor)
- Language: English
- Year: 2014
- Author: Edward Rochie Hardy
- Language: English
- Year: 2019
- Author: Paolo Vian (editor)
- Language: Italian
- Year: 1993
- Author: Siegfried Valentiner, Hermann König
- Language: German
- Year: 1967