C, S. L. ., S. . Saxena, and B. S. . Kumar. “Design Text Mining Classifier for Covid-19 by Using the Machine Learning Techniques”. International Journal of Intelligent Systems and Applications in Engineering, vol. 11, no. 2s, Feb. 2023, pp. 240 -, https://ijisae.org/index.php/IJISAE/article/view/2622.