
https://www.sipri.org/media/press-release/2018/global-arms-industry-us-companies-dominate-top-100-russian-arms-industry-moves-second-place

https://wiiw.ac.at/the-emissions-reduction-potential-for-freight-transport-on-a-high-speed-rail-line-along-the-european-silk-road-dlp-6635.pdf

http://www.nfuonline.com/assets/96747