Al-hawasy, Jamil Amir. “The Continuous Classical Boundary Optimal Control of a Couple Linear Of Parabolic Partial Differential Equations”. Al-Mustansiriyah Journal of Science 29, no. 1 (October 31, 2018): 118–126. Accessed May 7, 2024. https://mjs.uomustansiriyah.edu.iq/index.php/MJS/article/view/159.