Arif Fadllullah, Rahmatuz Zulfia, Tegar Palyus Fiqar, and Awang Pradana. “Real-Time Multiface Mask Automatic Detection System in Classroom Learning Using YOLOv4 Deep Learning”. Jurnal Sistem Cerdas, Vol. 7, no. 2, Aug. 2024, pp. 144 -54, doi:10.37396/jsc.v7i2.391.