Hartono, Theodorus Leo, Fransiscus Dalu Setiaji, and Iwan Setyawan. 2013. “ALAT BANTU ANALISIS HEART RATE VARIABILITY”. Techné : Jurnal Ilmiah Elektroteknika 12 (02):141-58. https://ojs.jurnaltechne.org/index.php/techne/article/view/91.