http://psk.blog.24heures.ch/archive/2020/12/20/g550-sigint-pour-l-italie%C2%A0-870266.html
https://www.defensenews.com/global/europe/2020/12/02/italy-lays-out-plans-to-buy-up-to-eight-new-sensor-loaded-gulfstreams/
https://www.ainonline.com/aviation-news/defense/2019-03-19/australia-orders-sigint-gulfstreams
