UVAROVA, M. A. Linguistic difficulties in the learning of foreign languages. Studia Ecologiae et Bioethicae, [S. l.], v. 15, n. 4, p. 55–62, 2017. DOI: 10.21697/seb.2017.15.4.06. Disponível em: https://czasopisma.uksw.edu.pl/index.php/seb/article/view/6255. Acesso em: 29 apr. 2024.