Nesteruk, I. and Benlagha, N. 2021. Predictions of COVID-19 Pandemic Dynamics in Ukraine and Qatar Based on Generalized SIR Model. Innovative Biosystems and Bioengineering. 5, 1 (Apr. 2021), 37–46. DOI:https://doi.org/10.20535/ibb.2021.5.1.228605.