CZYŻEWSKA, Dorota. Challenges of multilingualism in the EU. Economics and Business Review, Poland, v. 14, n. 3, p. 85–95, 2014. DOI: 10.18559/ebr.2014.3.834. Disponível em: https://journals.ue.poznan.pl/ebr/article/view/834. Acesso em: 4 apr. 2025.