Dynamical analysis and optimal control of a stochastic SIAR model for computer viruses Xiangyun Shi, Tairui Zhang, Dan Zhou and Xueyong Zhou Eur. Phys. J. Plus, 138 10 (2023) 874 Published online: 01 October 2023 DOI: 10.1140/epjp/s13360-023-04475-3