https://www.eca.europa.eu/Lists/News/NEWS1801_16/INSR_SSM2_EN.pdf
https://ec.europa.eu/commission/sites/beta-political/files/aviation.pdf
http://www.bmwi.de/Redaktion/DE/Publikationen/Monatsbericht/schlaglichter-der-wirtschaftspolitik-05-2017.pdf?__blob=publicationFile&v=24
https://www.brookings.edu/blog/techtank/2020/10/20/the-justice-departments-lawsuit-against-google-will-not-stop-big-techs-abuses/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=97867634&utm_source=hs_email