https://www.gatesnotes.com/2018-Annual-Letter?WT.mc_id=02_13_2018_02_AnnualLetter2018_DO-COM_&WT.tsrc=DOCOM
https://www.socialeurope.eu/ryanair-on-the-side-of-europes-citizens
https://publications.parliament.uk/pa/cm201719/cmselect/cmcumeds/1791/1791.pdf