
http://www.oecd.org/tax/beps/policy-note-beps-inclusive-framework-addressing-tax-challenges-digitalisation.pdf

http://ec.europa.eu/transport/sites/transport/files/eu_air_carriers_by_country_holding_an_active_operating_licence.pdf

https://www.warner.senate.gov/public/_cache/files/4/f/4fa9c9ba-2b34-4854-8c19-59a0a9676a31/66DECFBC0D6E6958C2520C3A6A69EAF6.safe-tech-act—final.pdf