Udayana, I Putu Agus Eka Darma, Ni Putu Eka Kherismawati, and I Gede Iwan Sudipa. 2022. “Detection of Student Drowsiness Using Ensemble Regression Trees in Online Learning During a COVID-19 Pandemic”. Telematika: Jurnal Telematika Dan Teknologi Informasi 19 (2):229-44. https://doi.org/10.31315/telematika.v19i2.7044.