https://emmaclancy.files.wordpress.com/2018/07/apple-tax-structure-and-rate-post-2014.pdf
https://ec.europa.eu/info/sites/info/files/communication-tackling-covid-19-disinformation-getting-facts-right_en.pdf
https://www.legislation.gov.uk/uksi/2020/680/pdfs/uksiem_20200680_en.pdf