https://www.aspistrategist.org.au/is-the-europen-union-too-big-for-further-enlargement/
https://www.bruegel.org/sites/default/files/2022-09/PC%2015%202022_0.pdf
http://www.eba.europa.eu/documents/10180/2101654/Letter+to+MEPs+on+the+request+to+investigate+a+possible+BUL+under+Article+17+of+Regulation+%28EU%29%20No+10932010+-+24092018.pdf