
https://www.brookings.edu/research/we-should-bail-out-airlines-during-the-coronavirus-pandemic-but-on-taxpayers-terms/?utm_campaign=Brookings%20Brief&utm_medium=email&utm_content=85010600&utm_source=hs_email

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwiYtOnpoqT1AhXV7rsIHfpxDhcQFnoECAcQAQ&url=https%3A%2F%2Fosf.io%2Fpreprints%2Fsocarxiv%2F8nzb4%2Fdownload&usg=AOvVaw1M87IVrQbHicDueJuLi74b

https://cdn.ymaws.com/www.export.org.uk/resource/resmgr/docs/policy_papers/IOE&IT_report_with_EY_TradeT.pdf