ALHASSAN CHARITY JUMAI; AKPAGHER, AONDOTSEA CALEB. USING NONLINEAR MATHEMATICAL MODEL TO STUDY THE IMPACT OF INFECTIOUS DISEASE ON CORONAVIRUS DISEASE IN A FUZZY ENVIRONMENT. Journal of Systematic and Modern Science Research, Nigeria, v. 7, n. 9, 2025. DOI: 10.70382/bejsmsr.v7i9.004. Disponível em: https://berkeleypublications.com/bjsmsr/article/view/393.. Acesso em: 3 nov. 2025.