
http://www.ips-journal.eu/regions/europe/article/show/the-topsy-turvy-election-pollsters-failed-to-predict-2096/

https://lawliberty.org/book-review/partisans-of-freedom/

https://www.corporatebenchmark.org/sites/default/files/2019-11/CHRB2019KeyFindingsReport.pdf