Heart Rate Variability in Obstructive Sleep Apnea. International Journal of Biomedical and Advance Research, [S. l.], v. 4, n. 6, p. 420–424, 2013. DOI: 10.7439/ijbar.v4i6.398. Disponível em: https://ssjournals.co.in/index.php/ijbar/article/view/332. Acesso em: 14 mar. 2026.