The obligation of refund of the "illegal" state aid in European Union law and its application in Spanish law. Revista de Estudios Europeos, [S. l.], n. 79, p. 389–407, 2021. DOI: 10.24197/ree.79.2022.389-407. Disponível em: https://revistas.uva.es/index.php/ree/article/view/5732. Acesso em: 8 jan. 2026.