Nuanmeesri, S., L. Poomhiran, and P. Kadmateekarun. “FACE MASK DETECTION AND WARNING SYSTEM FOR PREVENTING RESPIRATORY INFECTION USING THE INTERNET OF THINGS”. COMPUSOFT: An International Journal of Advanced Computer Technology, Vol. 9, no. 9, Sept. 2020, pp. 3810-6, https://ijact.in/index.php/ijact/article/view/1205.