https://static.rusi.org/mass-precision-strike-final.pdf
http://www.pircenter.org/en/news/6973-1224507
https://www.osw.waw.pl/sites/default/files/pw_69_pesco_ang_net.pdf
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/969402/The_Integrated_Review_of_Security__Defence__Development_and_Foreign_Policy.pdf