Charlex, Harold Jefferson Matthew, Yanuar Ardani, and Hamzah Shatri. “Heart Rate Variability As a Prognostic Tool for Palliative Patient : A Literature Review”. International Journal of Cell and Biomedical Science 2, no. 5 (August 29, 2024): 143-151. Accessed January 31, 2026. https://cbsjournal.com/cbs/article/view/34.