Tajmouati, A., M. Amouch, and M.R.F. Alhomidi Zakariya. “Some Spectral Inclusion for Strongly Continuous Semigroups Operators”. Italian Journal of Pure and Applied Mathematics 43 (February 14, 2020): 531–543. Accessed November 6, 2026. https://journals.uniurb.it/index.php/ijpam/article/view/7319.