“Regional Performance Measurement of Healthcare Systems in the EU: A Non-Parametric Approach”. Lex localis - Journal of Local Self-Government 13, no. 3 (July 31, 2015): 579–593. Accessed September 21, 2025. https://lex-localis.org/index.php/LexLocalis/article/view/13.3.579-593%282015%29.