Persada SF, Oktavianto A, Miraja B, Nadlifatin R, Belgiawan PF, Perwira Redi AP. Public Perceptions of Online Learning in Developing Countries: A Study Using The ELK Stack for Sentiment Analysis on Twitter. Int. J. Emerg. Technol. Learn. [Internet]. 2020 May 15 [cited 2024 Nov. 22];15(09):pp. 94-109. Available from: https://online-journals.org/index.php/i-jet/article/view/11579