
http://www.ips-journal.eu/regions/global/article/show/why-pollsters-normally-get-it-right-more-or-less-2299/

https://www.iod.com/news-campaigns/press-office/details/Hung-parliament-causes-plunge-in-business-confidence-but-little-appetite-for-another-election

https://www.dni.gov/index.php/global-trends/the-future-summarized