1. Air Force Technology. (2020)RQ‐4A/B Global Hawk HALE Reconnaissance UAV. Air Force Technology. Available from:https://www.airforce‐technology.com/projects/rq4‐global‐hawk‐uav/
2. Aliyev N.(2019)Russia's military capabilities in the Arctic. ICDS. Available from:https://icds.ee/en/russias‐military‐capabilities‐in‐the‐arctic/
3. Arctic Today. (2019)Shipping volumes on the Northern Sea Route are up by more than 60 percent.Arctic Today. Available from:https://www.arctictoday.com/shipping‐volumes‐on‐the‐northern‐sea‐route‐are‐up‐by‐more‐than‐60‐percent/
4. Aviaexpo. (n.d.)AeroVironment RQ‐20A Puma. Available from:www.aviaexpo.com/en/products/defence‐weapons‐systems/military‐aircrafts‐and‐drones/uav‐uas‐drones/aerovironment‐rq‐20a‐puma/
5. Barrabi T.(2015)Russia will own hundreds of military drones by 2025.IBT. Available from:https://www.ibtimes.com/russia‐will‐own‐hundreds‐military‐drones‐2025‐1926880