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leonardocompany.com
"OTO Vulcano 155". Leonardo Company. Archived from the original on 19 December 2016. Retrieved 15 April 2021.
Becker, Tim, "Class F125 Frigate – First Interim Result", European Security and Defence (in German), no. 1/2011, Mittler Report Verlag, archived from the original(online bei docstoc) on 16 February 2015, retrieved 31 January 2015