https://fnce.wharton.upenn.edu/wp-content/uploads/2023/07/Paper4_Bornstein.pdf
http://openeurope.org.uk/today/blog/will-brexit-ground-flights-europe/
https://www.wto.org/english/res_e/booksp_e/gvc_dev_report_2019_e.pdf
https://www.politico.eu/article/elon-musk-ukraine-starlink/?utm_source=POLITICO.EU&utm_campaign=f86ce35b1e-EMAIL_CAMPAIGN_2022_06_09_11_29&utm_medium=email&utm_term=0_10959edeb5-f86ce35b1e-190380769