
http://website-pace.net/documents/19895/585401/20140625-HandbookPlatformCorruption-EN.pdf/d6bbdea0-f3d4-4160-9e3a-b284bb4d8d95

https://www.bertelsmann-stiftung.de/fileadmin/files/BSt/Publikationen/imported/leseprobe/1_974_Leseprobe.pdf

https://www.socialeurope.eu/the-final-countdown-the-eu-poland-and-the-rule-of-law