https://www.esri.ie/sites/default/files/media/file-uploads/2020-01/Slides_1.pdf
http://library.fes.de/pdf-files/dialog/13464.pdf
https://www.esri.ie/system/files/publications/RS123.pdf
https://www.etui.org/sites/default/files/2025-06/Benchmarking%20Working%20Europe%202025%20-%20WEB.pdf