"Presi Guana e Fontana" [Guana and Fontana acquired] (in Italian). US Città di Palermo. 24 May 2006. Archived from the original on 28 March 2020. Retrieved 24 July 2011.
ilportiere.com
"A Palermo scoppia il caso-Fontana" [Fontana-affair explodes at Palermo] (in Italian). Il Portiere. 12 December 2008. Archived from the original on 30 January 2016. Retrieved 21 January 2016.
"Presi Guana e Fontana" [Guana and Fontana acquired] (in Italian). US Città di Palermo. 24 May 2006. Archived from the original on 28 March 2020. Retrieved 24 July 2011.
"A Palermo scoppia il caso-Fontana" [Fontana-affair explodes at Palermo] (in Italian). Il Portiere. 12 December 2008. Archived from the original on 30 January 2016. Retrieved 21 January 2016.