"Forteresse du Janus". Patrimoine XXeme (in French). DRAC Alpes-Provence-Cote d'Azur. 2002. Archived from the original on 5 December 2008. Retrieved 3 February 2010.
"Forteresse du Janus". Patrimoine XXeme (in French). DRAC Alpes-Provence-Cote d'Azur. 2002. Archived from the original on 5 December 2008. Retrieved 3 February 2010.