Enrico Maida. "VIERCHOWOD, Pietro" (in Italian). Treccani: Enciclopedia dello Sport (2002). Retrieved 26 October 2017.
tuttojuve.com
Stefano Bedeschi (19 April 2013). "Gli eroi in bianconero: Pietro VIERCHOWOD" [The heroes in black and white: Pietro VIERCHOWOD] (in Italian). Tutto Juve. Retrieved 4 August 2016.