ROJCZYK, A. Forming New Vowel Categories in Second Language Speech: The Case of Polish Learners’ Production of English /I/ and /e/. Research in Language, [S. l.], v. 8, p. 85–97, 2010. DOI: 10.2478/v10015-010-0008-3. Disponível em: https://czasopisma.uni.lodz.pl/research/article/view/8283. Acesso em: 12 may. 2024.