Grigorov, T. V. . (2023) “COVID-19: History, Etiology, Epidemiology, and Pathogenesis”, American Scientific Research Journal for Engineering, Technology, and Sciences, 92(1), pp. 153–159. Available at: https://www.asrjetsjournal.org/index.php/American_Scientific_Journal/article/view/8671 (Accessed: 27 April 2024).