Nguyen, C., and H. To. “Evaluating the Applicability of a Low-Cost Sensor for Measuring PM2.5 Concentration in Ho Chi Minh City, Viet Nam”. Science and Technology Development Journal, Vol. 22, no. 3, Sept. 2019, pp. 343-7, doi:https://doi.org/10.32508/stdj.v22i3.1688.