Octavianus, Reza, Yoga Yuniadi, and Budhi Setianto. “QT Dispersion and T-Wave Alternans of Early Repolarization Electrocardiogram”. Indonesian Journal of Cardiology 33, no. 2 (June 12, 2013): 83–90. Accessed October 28, 2026. http://www.ijconline.id/index.php/ijc/article/view/66.