Efrilianda DA, Dianti EN, Khoirunnisa OG. Analysis of twitter sentiment in COVID-19 era using fuzzy logic method. J. Soft Comput. Explor. [Internet]. 2021Mar.31 [cited 2025May21];2(1):1-5. Available from: https://www.shmpublisher.com/index.php/joscex/article/view/12