A mathematical and parametric study of epidemiological smoking model: a deterministic stability and optimality for solutionsTakasar Hussain, Aziz Ullah Awan, Kashif Ali Abro, Muhammad Ozair and Mehwish ManzoorEur. Phys. J. Plus, 136 1 (2021) 11DOI: https://doi.org/10.1140/epjp/s13360-020-00979-4