Tajmouati, A., M. Amouch, and M.R.F. Alhomidi Zakariya. 2020. “Some Spectral Inclusion for Strongly Continuous Semigroups Operators”. Italian Journal of Pure and Applied Mathematics 43 (February):531-43. https://journals.uniurb.it/index.php/ijpam/article/view/7319.