
https://www.publications.parliament.uk/pa/cm201617/cmselect/cmscotaf/82/82.pdf

http://www.lastampa.it/2016/06/27/italia/politica/rodot-quando-i-referendum-diventano-un-boomerang-JuXpMSRHAkJH5mE0mawMrL/pagina.html

https://www.venice.coe.int/webforms/documents/default.aspx?pdffile=CDL-REF(2024)002-e