Ahmad, Z., and N. Zuber. “Masks and Respirators to Prevent SARS CoV-2 Transmission: Types, Protection, When to Use and Spotting the Fake”. JMS SKIMS, Vol. 24, no. 1, Mar. 2021, pp. 3-11, doi:https://doi.org/10.33883/jms.v24i1.798.