Smyshlyaev, P. P. “The Maximum Principle of Pontryagin in the Heat-Mass Transfer Problem”. Technische Mechanik - European Journal of Engineering Mechanics 21, no. 2 (September 17, 2019): 131–134. Accessed November 22, 2024. https://journals.ub.ovgu.de/index.php/techmech/article/view/1050.