The Need to Standardize the Criteria for Classifying Protected Areas within the EU. Journal of Danubian Studies and Research, [S. l.], v. 15, n. 2, p. 57–66, 2025. Disponível em: https://dj.univ-danubius.ro/index.php/JDSR/article/view/3487. Acesso em: 11 may. 2026.