Bulut, H., Öner, Y. and Sözen, Çağlar (2017) “Clustering of Member and Candidate Countries of the European Union”, International Journal of Sciences: Basic and Applied Research (IJSBAR), 36(7), pp. 18–25. Available at: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/8274 (Accessed: 7 November 2025).