- Author: Francesco Galgano
- Language: Italian
- Year: 2010
- Author: Francesco Galgano
- Language: Italian
- Year: 2008
- Author: Mr. Francesco Galgano
- Language: Spanish
- Year: 2012
- Author: Sergio Fusai, Francesco Galgano
- Language: Italian
- Year: 2006
- Author: Francesco Galgano
- Language: English