https://blogs.lse.ac.uk/europpblog/2023/10/17/why-differentiation-is-now-at-the-heart-of-europes-political-system/
http://wir2018.wid.world/files/download/wir2018-full-report-english.pdf
https://www.occrp.org/en/daily/18685-slovakia-dissolves-department-in-charge-of-kuciak-case-prosecutors-resign