Ilxom Maxmudovich Zulfixarov , Iskandarov Davlatbek Xursanbekovich , Dilfuzaxon Anvarovna Buranova , Zaparov Ziyodullo Abdumalikovich 2020. MATHEMATICAL METHODS OF FIGHTING VS COVID-19. PalArch’s Journal of Archaeology of Egypt / Egyptology. 17, 6 (Dec. 2020), 3488 - 3493.