Stability of a delay-distributed HIV infection model with silent infected cell-to-cell spread and CTL-mediated immunityN. H. AlShamrani, A. M. Elaiw and H. DuttaEur. Phys. J. Plus, 135 7 (2020) 593DOI: https://doi.org/10.1140/epjp/s13360-020-00594-3