Hameed, Amal S., and Radhi A. Zaboon. “Approximate Solutions for Optimal Control of Fixed Boundary Value Problems Using Variational and Minimum Approaches”. Al-Mustansiriyah Journal of Science 34, no. 3 (September 30, 2023): 72–85. Accessed May 20, 2024. https://mjs.uomustansiriyah.edu.iq/index.php/MJS/article/view/1104.