https://www.esri.ie/system/files/publications/RS170.pdf
https://feps-europe.eu/wp-content/uploads/2023/01/Progressive-Yearbook-2023.pdf
https://table.media/wp-content/uploads/2024/05/24165405/240523_CERRE_DSA-Systemic-Risk-2_Elections-paper_FINAL.pdf
http://www.euronews.com/2017/06/09/catalonia-announces-independence-referendum?utm_source=newsletter&utm_medium=en&utm_content=catalonia-announces-independence-referendum&_ope=eyJndWlkIjoiZjU3Y2JhYmUwMGUxZDFiNTUxOTU1ZDljNzExNTI1MmEifQ==