http://www.morganstanley.com/ideas/global-trade-protectionism
https://www.cesifo.org/DocDL/cesifo1_wp7982.pdf
https://www.ftc.gov/system/files/documents/reports/nixing-fix-ftc-report-congress-repair-restrictions/nixing_the_fix_report_final_5521_630pm-508_002.pdf
https://www.occrp.org/en/investigations/kazakhstan-has-become-a-pathway-for-the-supply-of-russias-war-machine-heres-how-it-works