
https://www.navexglobal.com/en-gb/file-download-canonical?file=/Navex_YOTW_Survey_Report_-_Executive_Summary_Final_0.pdf

https://search.coe.int/cm/Pages/result_details.aspx?ObjectID=09000016809ed062

https://op.europa.eu/en/publication-detail/-/publication/8ba0a8fd-4c83-11ea-b8b7-01aa75ed71a1