Shaterian, N., F. Abdi, Z. Atarodi Kashani, N. Shaterian, and M. Darvishmotevalli. “Facemask and Respirator in Reducing the Spread of Respiratory Viruses; A Systematic Review”. Archives of Academic Emergency Medicine, vol. 9, no. 1, Aug. 2021, p. e56, doi:10.22037/aaem.v9i1.1286.