ORHON , E. Şahin .; MALKOÇ , T. . The effects of yawn-sigh, lip trill and tongue relaxation exercises on frequency and amplitude perturbation of voice in vocal training. Cypriot Journal of Educational Sciences, [S. l.], v. 17, n. 1, p. 01–17, 2022. DOI: 10.18844/cjes.v17i1.6649. Disponível em: https://www.un-pub.eu/ojs/index.php/cjes/article/view/6649. Acesso em: 14 may. 2024.