Tutak, Magdalena, and Jarosław Brodny. “Progress towards the Innovation Potential of the European Union Member States Using Grey Relational Analysis and Multidimensional Scaling Methods”. Decision Making: Applications in Management and Engineering 6, no. 1 (April 8, 2023): 186–218. Accessed September 13, 2025. https://www.dmame-journal.socialspacejournal.eu/index.php/dmame/article/view/597.