IKONOMOU, C. An assessment of European integration for the EU-15 (1971-2015). Περιφέρεια | Regional Integration: Politics, Economics, Governance, [S. l.], n. 10, p. 43–69, 2020. DOI: 10.12681/rp.25480. Disponível em: https://ejournals.epublishing.ekt.gr/index.php/periphery/article/view/25480. Acesso em: 16 απριλίου. 2025.