Efficiency of the R&D Sector in the EU-27 at the Regional Level: An Application of DEA. Lex localis - Journal of Local Self-Government, [S. l.], v. 12, n. 3, p. 519–531, 2014. DOI: 10.4335/12.3.519-531(2014). Disponível em: https://lex-localis.org/index.php/LexLocalis/article/view/12.3.519-531%282014%29. Acesso em: 21 sep. 2025.