VOLÍN, J.; WEINGARTOVÁ, L.; SKARNITZL, R. Spectral Characteristics of Schwa in Czech Accented English. Research in Language, [S. l.], v. 11, n. 1, p. 31–39, 2013. DOI: 10.2478/v10015-012-0008-6. Disponível em: https://czasopisma.uni.lodz.pl/research/article/view/6514. Acesso em: 5 may. 2024.