Alshammary, Dr. Heba, and Dr. Munther Abumismar. “Transmission Risk and Protective Protocols for COVID-19 in Dentistry: Systematic Review”. International Journal of Dental Research, vol. 9, no. 1, Mar. 2022, pp. 1-11, https://doi.org/10.14419/ijdr.v9i1.31922.