
https://www.washingtonpost.com/world/europe/russian-submarines-are-prowling-around-vital-undersea-cables-its-making-nato-nervous/2017/12/22/d4c1f3da-e5d0-11e7-927a-e72eac1e73b6_story.html?utm_term=.e39e8fb9dafe

http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:52016DC0950&from=en

https://www.atlanticcouncil.org/in-depth-research-reports/report/implementing-natos-strategic-concept-on-china/?mkt_tok=NjU5LVdaWC0wNzUAAAGJ_uISKKmK5ChQmYqp3FIy22EKhsuSDhecKS0SsZNJ1sV3V2fpPArSTKmn88kbPdZnR2NjVs1-ceAcrug_2H6hqtyE2xjvAZwEcKPyr82mlu0