1. Alexander, H., & Badcock, J. (2017). Why does Catalonia want independence from Spain? Retrieved September 15, 2022, from https://www.telegraph.co.uk/news/0/does-catalonia-want-independence-spain/
2. Ajuntament de Barcelona. (n.d.). Taxes. Retrieved September 15, 2022, from https://www.barcelona.cat/internationalwelcome/en/need/taxes
3. ARA. (2018). Another lost year for infrastructure in Catalonia. Retrieved September 15, 2022, from https://en.ara.cat/misc/another-lost-year-infrastructure-catalonia_129_2733982.html
4. Audretsch, D. (2015). Everything in its place: Entrepreneurship and the strategic management of cities, regions, and states. Oxford University Press.
5. Barcelona.de. (n.d.). Barcelona’s languages. Retrieved September 15, 2022, from https://www.barcelona.de/en/barcelona-languages.html