Hankar, M. ., M. . Birjali, A. . El-Ansari, and A. . Beni-Hssane. “COVID-19 Impact Sentiment Analysis on a Topic-Based Level”. Journal of ICT Standardization, vol. 10, no. 02, May 2022, pp. 219-40, doi:10.13052/jicts2245-800X.1027.