Utomo, B., T. Triwiyanto, S. Luthfiyah, W. R. Hidayani, and L. Handoko. “Low-Cost Physiological Parameter Development Using Internet of Things Based for Monitoring Health Elderly”. Open Access Macedonian Journal of Medical Sciences, vol. 10, no. B, Apr. 2022, pp. 1726-30, doi:10.3889/oamjms.2022.8818.