DE GROOT, Gerard René. THE SYSTEM OF PROTECTION OF REGIONAL OR MINORITY LANGUAGES WITHIN THE COUNCIL OF EUROPE. POLISSEMA – Revista de Letras do ISCAP, [S. l.], v. 1, n. 24, p. 55–86, 2024. DOI: 10.34630/polissema.vi.5639. Disponível em: https://parc.ipp.pt/index.php/Polissema/article/view/5639. Acesso em: 5 dez. 2025.