Nisha Singh, Priyadarshini Rangari, Chandan Singh, and Sharmila S Raut, “Assessing the role of saliva and gargle lavage as a cost-effective alternative to the throat and nasal swabs for diagnosing Covid-19”, Int. J. Heal. Clin. Res., vol. 4, no. 23, pp. 427–429, Dec. 2021.