Duczon, Árpád, et al. “Competitiveness Study in South-West Hungary: Competitiveness of Non Profit Institutions and Their Roles in the region’s Competitiveness”. The Hungarian Journal of Marketing and Management, vol. 42, no. 3, Oct. 2019, pp. 50-56, https://journals.lib.pte.hu.testing.qulto.eu/index.php/mm/article/view/536.