
https://openknowledge.worldbank.org/bitstream/handle/10986/36647/What-Has-Been-the-Impact-of-COVID-19-on-Debt-Turning-a-Wave-into-a-Tsunami.pdf?sequence=1&isAllowed=y

https://www.mckinsey.com/industries/financial-services/our-insights/how-payments-can-adjust-to-the-coronavirus-pandemic-and-help-the-world-adapt

https://cebr.com/world-economic-league-table/