PORZUCZEK, A. Measuring Vowel Duration Variability in Native English Speakers and Polish Learners. Research in Language, [S. l.], v. 10, n. 2, p. 201–214, 2012. DOI: 10.2478/v10015-011-0034-9. Disponível em: https://czasopisma.uni.lodz.pl/research/article/view/7915. Acesso em: 5 may. 2024.