Xu, Youjun, Huilan Wang, and Yanqi Liu. “Pontryagin’s Maximum Principle of Optimal Control Governed by A Convection Diffusion Equation”. Communications in Mathematics and Applications 4, no. 2 (October 12, 2013): 119–125. Accessed November 22, 2024. http://rgnpublications.com/journals/index.php/cma/article/view/167.