Bonnici, Hermann (2004–2007). "Fort Ricasoli"(PDF). Arx – Online Journal of Military Architecture and Fortification (1–4): 33–38. Archived from the original(PDF) on 15 November 2015. Retrieved 10 October 2015.
Bonnici, Hermann (2004–2007). "Fort Ricasoli"(PDF). Arx – Online Journal of Military Architecture and Fortification (1–4): 33–38. Archived from the original(PDF) on 15 November 2015. Retrieved 10 October 2015.