AL-HAWASY, J. A.; AL-QAISI, S. J. M. The Continuous Classical Boundary Optimal Control of a Couple Nonlinear Elliptic Partial Differential Equations with State Constraints. Al-Mustansiriyah Journal of Science, [S. l.], v. 30, n. 1, p. 143–151, 2019. DOI: 10.23851/mjs.v30i1.464. Disponível em: https://mjs.uomustansiriyah.edu.iq/index.php/MJS/article/view/464. Acesso em: 25 feb. 2024.