https://static.rusi.org/mass-precision-strike-final.pdf
https://www.timesofisrael.com/us-military-tells-iraq-it-is-preparing-to-move-out-official-letter/?utm_source=Breaking+News&utm_campaign=breaking-news-2020-01-06-2215562&utm_medium=email
http://www.euronews.com/2017/05/29/divisions-of-poland-s-new-defence-strategy?utm_source=newsletter&utm_medium=en&utm_content=divisions-of-poland-s-new-defence-strategy&_ope=eyJndWlkIjoiZjU3Y2JhYmUwMGUxZDFiNTUxOTU1ZDljNzExNTI1MmEifQ==
http://www.irsd.be/website/images/livres/rmb/19/ed_19_art_16.pdf