1. Airlines for Europe (A4E), 2017a. Badly regulated airports make five times the profits of well regulated. In: Policy Brief 02/2017. Airlines for Europe, Brussels.
2. Airlines for Europe (A4E), 2017b. European airline CEOs concerned about “supernormal” returns at the majority of Europe’s largest airports. In: Policy Brief 04/2017. Airlines for Europe, Brussels.
3. Airlines for Europe (A4E), 2018. Revised Airport Regulation Will Benefit European Consumers. Airlines for Europe, Brussels. Press Release 6 March.
4. 2013 ACI Airport Economics Report;Airports Council International (ACI),2014
5. 2014 ACI Airport Economics Report;Airports Council International (ACI),2015