Al-Hawasy, Jamil A. Ali, and Wissam A. Abdul-Hussien Al-Anbaki. “The Classical Continuous Optimal Control for Quaternary Parabolic Boundary Value Problem”. Iraqi Journal of Science 64, no. 2 (February 28, 2023): 768–782. Accessed December 6, 2025. https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/5749.