1. Airline Investor Reporthttps://www.iata.org/en/iata-repository/publications/economic-reports/new-study-on-airline-investor-returns/
2. IATA’s Annual Review 2020https://www.iata.org/en/publications/annual-review/
3. State Support to the Air Transport Sector: Monitoring Developments Related to the COVID-19 Crisishttps://www.oecd.org/corporate/State-Support-to-the-Air-Transport-Sector-Monitoring-Developments-Related-to-the-COVID-19-Crisis.pdf