Analysis of Public Agenda during Covid-19 Pandemics Based on Turkish and English Tweets Using Nonnegative Matrix Factorization and Hypothesis Testing. Elektronika ir Elektrotechnika, [S. l.], v. 28, n. 4, p. 65–73, 2022. DOI: 10.5755/j02.eie.31196. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/31196.. Acesso em: 5 dec. 2025.