UL HAQ, Ihtesham; WADOOD, Abdul. Variation in Heart Rate with the Severity of Hypertension. Journal of Postgraduate Medical Institute, [S. l.], v. 3, n. 1, 2011. Disponível em: https://www.jpmi.org.pk/index.php/jpmi/article/view/335. Acesso em: 5 dec. 2025.