Klepikov I., As Evidenced by the Statistics of the Pandemic, International Journal of Coronaviruses, Volume 2, Issue 2, 2020, Pages 1-7, ISSN 2692-1537, https://doi.org/10.14302/issn.2692-1537.ijcv-20-3625.
(https://oap-researchnetwork.orgijcv/article/1507)
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