I. EDISSONOV, and S. RANCHEV. “MODELLING AND SIMULATION OF THE IMMUNE PROCESS AT VIRAL HEPATITIS C”. International Journal For Research In Mathematics And Statistics (ISSN: 2208-2662), Vol. 5, no. 7, July 2019, pp. 01-09, https://gnpublication.org/index.php/ms/article/view/1021.