Yang, Chan-Yun, Hooman Samani, Nana Ji, Chunxu Li, Ding-Bang Chen, and Man Qi. 2022. “Deep Learning Based Real-Time Facial Mask Detection and Crowd Monitoring”. COMPUTING AND INFORMATICS 40 (6):1263–1294. https://doi.org/10.31577/cai_2021_6_1263.