Hadi Putri, Dewi Indriati, et al. “Unlocking Wellness: Pionering IoT Wearable Sensor With The Smart Ring for Body Fatigue Monitoring”. Ultima Computing : Jurnal Sistem Komputer, vol. 17, no. 2, Dec. 2025, pp. 54-61, doi:10.31937/sk.v17i2.4172.