Al-hawasy JA, Al-Qaisi SJM. The Continuous Classical Boundary Optimal Control of a Couple Nonlinear Elliptic Partial Differential Equations with State Constraints. Al-Mustansiriyah Journal of Science [Internet]. 2019 Aug. 15 [cited 2024 May 3];30(1):143-51. Available from: https://mjs.uomustansiriyah.edu.iq/index.php/MJS/article/view/464