"2015 Bilancio"(PDF) (in Italian). Cassa di Risparmio di Volterra. 16 June 2016. Archived from the original(PDF) on 13 August 2016. Retrieved 26 June 2016.
"2015 Bilancio"(PDF) (in Italian). Cassa di Risparmio di Volterra. 16 June 2016. Archived from the original(PDF) on 13 August 2016. Retrieved 26 June 2016.