et. al., J. J. . “Topic Modeling and Sentimental Analysis of Tweets on Covid19 to Find the Weightage of the Popular Hashtag”. Turkish Journal of Computer and Mathematics Education (TURCOMAT), vol. 12, no. 9, Apr. 2021, pp. 1856-61, https://turcomat.org/index.php/turkbilmat/article/view/3612.