Usman I. G., Ibrahim M. O., Isah B. Y., Lawal N. and Akinyemi S. T. (2023) “APPLICATION OF NON-STANDARD FINITE DIFFERENCE METHOD ON COVID-19 MATHEMATICAL MODEL WITH FEAR OF INFECTION”, FUDMA JOURNAL OF SCIENCES, 7(4), pp. 357 - 368. doi: 10.33003/fjs-2023-0704-1933.