- Author: Giordano Bruno, Fulvio Papi (ed.)
- Language: Italian
- Year: 1975
- Author: Bernardino Varisco, Ernesto Codignola (editor)
- Language: Italian
- Year: 1944
- Author: Antonio Capizzi
- Language: Italian
- Year: 1974
- Author: Rodolfo Mondolfo
- Language: Italian
- Year: 1967