Παπαχρόνη Μαργαρίτα, and Μαύρη Μαρία. “Identification of Regional Clusters in Greek Economy”. SPOUDAI Journal of Economics and Business 56, no. 2 (June 5, 2006): 89–132. Accessed April 4, 2025. https://spoudai.org/index.php/journal/article/view/367.