CHELLAI, Fatih. The Trajectory of Corona-virus and Peoples’ Concern in Africa: A Markov Switching Regression Model Based on Google Trends® Analysis. Journal of Mathematics and Statistics Studies, [S. l.], v. 1, n. 1, p. 40–49, 2020. Disponível em: https://al-kindipublishers.org/index.php/jmss/article/view/542. Acesso em: 30 nov. 2025.