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

https://www.ecfr.eu/article/commentary_european_solidarity_tracker_the_solidarity_that_always_was_there

https://english.bdi.eu/media/presse/presse/downloads/20180308_Climate_Paths_for_Germany_ExecutiveSummary_FINAL.pdf