Yudhatama, L. S., I. Yansen, and E. Nokik. “A Way of Determining Accessory Pathway Based on 12 Lead Electrocardiogram”. ARKAVI [Arsip Kardiovaskular Indonesia], vol. 4, no. 1, Jan. 2019, pp. 237-43, https://journal.uhamka.ac.id/index.php/arkavi/article/view/5542.