
https://www.socialeurope.eu/the-worlds-of-work-in-transition-managing-the-megatrends-impacting-labour-markets-and-society

http://www.etui.org/Publications2/Working-Papers/Why-central-and-eastern-Europe-needs-a-pay-rise

https://www.ipg-journal.de/regionen/global/artikel/detail/vorbei-mit-der-freiwilligkeit-4508/