ЕГОРОВ, О.Н.; 						КИСЕЛЁВ, А.И..
 COVID-19: A Naturally Occurring Infection or a Biological Weapon of the XXI Century?.
<strong>Bulletin CSU. Education and Healthcare</strong>, [S.l.], n. 3(19), p. 42-46, dec. 2022.
ISSN 2409-4102. Available at: &lt;<a href="https://journals.csu.ru/index.php/vcsu_eh/article/view/1790" target="_new">https://journals.csu.ru/index.php/vcsu_eh/article/view/1790</a>&gt;. Date accessed: 20 apr. 2026.
doi: <a href="https://doi.org/10.24411/2409-4102-2022-10306">https://doi.org/10.24411/2409-4102-2022-10306</a>.