J. Delhey, „The prospects of catching up for new EU members. Lessons for the accession countries to the European Union from previous enlargements”, RCV, vol. 13, nr. 1-4, pp. 21–40, mai 2023, Data accesării: 6 noiembrie 2026. [Online]. Disponibil la: https://revistacalitateavietii.ro/journal/article/view/890