1. COVID-19 to Slash Global Economic Output by $8.5 Trillion over Next Two Years
https://www.un.org/en/desa/covid-19-slash-global-economic-output-85-trillion-over-next-two-years
2. Impacts and implications of COVID-19 on the global hotel industry and Airbnb;Nhamo,2020
3. Coronavirus Pandemic Could Cost Global Tourism $2 Trillion This Year
https://news.un.org/en/story/2021/11/1106712
4. Rethinking Management and Promotion of Tourist Destinations Amidst COVID-19: Good Practices and Challenges;Goel,2021
5. COVID-19 and the Recovery of the Tourism Industry;Assaf,2020