
https://ec.europa.eu/commission/presscorner/api/files/document/print/en/speech_21_4701/SPEECH_21_4701_EN.pdf

https://www.aspistrategist.org.au/is-the-europen-union-too-big-for-further-enlargement/

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