chellai, fatih (2020) “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, 1(1), pp. 40–49. Available at: https://al-kindipublishers.org/index.php/jmss/article/view/542 (Accessed: 30 November 2025).