Ali .Zboon, R., Ramadhan.Kider, J. and Kasim .Hassan, S. (2017) “Solvability and Admissibility of Linear Perturbed Unbounded Differential Operator Equations with Unbounded Control input Via Composite perturbation Semigroup Approach”, Journal of Al-Qadisiyah for Computer Science and Mathematics, 3(1), pp. 101–129. Available at: https://jqcsm.qu.edu.iq/index.php/journalcm/article/view/244 (Accessed: 15 November 2024).