http://psk.blog.24heures.ch/archive/2020/04/05/la-bulgarie-signe-pour-des-f-16-%C2%A0viper%C2%A0-%C2%A0-868961.html
Sur les Foreign Military Sales (FMS) voir https://www.dsca.mil/programs/foreign-military-sales-fms
https://www.lockheedmartin.com/en-us/products/f-16.html