http://www.iata.org/publications/economic-briefings/value-of-air-cargo-2016-summary.pdf
https://www.wto.org/english/res_e/reser_e/ersd201704_e.pdf
https://ec.europa.eu/agriculture/sites/agriculture/files/external-studies/2016-bilateral-trade-agreements/exec-sum_en.pdf
https://ec.europa.eu/commission/sites/beta-political/files/reflection-paper-globalisation_en.pdf
http://www.ecb.europa.eu/pub/pdf/other/ebart201703_01.en.pdf
https://fullfact.org/europe/how-many-free-trade-deals-has-eu-done/
https://iea.org.uk/publications/sea-change-how-markets-property-rights-could-transform-the-fishing-industry/
http://www.realclearworld.com/articles/2017/04/17/a_us-uk_trade_agreement_and_the_trump_re-election_campaign_112297.html