SPAAI, Gerard W. G.; HERMES, Dik J. A Visual Display for the Teaching of Intonation. CALICO Journal, [S. l.], v. 10, n. 3, p. 19–30, 2013. DOI: 10.1558/cj.v10i3.19-30. Disponível em: https://journal.equinoxpub.com/Calico/article/view/16331.. Acesso em: 16 jul. 2024.