Nirmalya Biswas, and Subham Das. “A Study on the Acceptability of N95 Respirators Among Private Medical Practitioners During COVID 19 Pandemic”. International Journal of Health and Clinical Research, vol. 4, no. 14, Aug. 2021, pp. 81-84, https://ijhcr.com/index.php/ijhcr/article/view/2265.