“Cluster Analysis for the Determination of Innovative and Sustainable Oriented Regions in Europe”. Studia Universitatis Vasile Goldiș Arad, Seria Științe Economice 28, no. 2 (June 13, 2018): 36–47. Accessed April 17, 2026. https://publicatii.uvvg.ro/index.php/studiaeconomia/article/view/330.