Al-Hawasy JAA. The Continuous Classical Optimal Control of a Couple Nonlinear Hyperbolic Partial Differential Equations with Equality and Inequality Constraints. Iraqi Journal of Science. 2022;57(2C):1528-1538. Accessed January 3, 2026. https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/7170