Sablin, Oleg, Yuliia Zelenko, and Volodymyr Horobets. 2024. “A COMBINATORIAL MATHEMATICAL MODEL OF THE DYNAMICS OF THE INCIDENCE OF COVID-19 ON THE EXAMPLE OF THE SITUATION IN THE UKRAINE”. European Science 2 (sge34-02):80-92. https://doi.org/10.30890/2709-2313.2024-34-00-011.