https://ecipe.org/wp-content/uploads/2024/02/ECI_OccasionalPaper_02-2024_LY02.pdf
ftp://ftp.unibocconi.it/pub/RePEc/bcu/papers/iefewp69.pdf
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://sciencespo.hal.science/hal-03874282v1/file/2022_zhuravskaya_guriev_markevich_new_russian_economic_history.pdf