1. 1IATA 2013. IATA Technology Roadmap, URL: https://www.iata.org/whatwedo/environment/Documents/technology-roadmap-2013.pdf, last cited: 24.04.2015
2. 4IATA 20-year Air Passenger Forecast 2017-2036, http://www.iata.org/pressroom/pr/Pages/2017-10-24-01.aspx, last cited: 14.05.2018
3. Airbus, 2012. Global Market Forecast 2012-2031: Navigating the Future.