Al-Hawasy, J. A. A. .; Kadhem, G. M. .; Naeif, A. A. H. . The Classical Continuous Mixed Optimal Control of Couple Nonlinear Parabolic Partial Differential Equations With State Constraints. Iraqi Journal of Science 2021, 62 (12), 4859-4874. https://doi.org/10.24996/ijs.2021.62.12.24.