SAKAI, Motoki. Estimation of Heart Rate from Vocal Frequency Based on Support Vector Machine. International Journal of Advances in Scientific Research, India, v. 2, n. 1, p. 16–22, 2016. DOI: 10.7439/ijasr.v2i1.2849. Disponível em: https://ssjournals.co.in/index.php/ijasr/article/view/2849. Acesso em: 4 apr. 2026.