Petre, Adrian. “Trends and Challenges of Cohesion and Convergence in the European Union”. International Journal of Economic Practices and Theories 5, no. 4 (January 6, 2016): 381-388. Accessed May 30, 2026. http://ijept.eu/index.php/ijept/article/view/Trends_and_Challenges_of_Cohesion_and_Convergence_in_the_Europ.