Kapustyan, V. E., and I. A. Pyshnograev. “Problem of Optimal Control for Parabolic-Hyperbolic Equations With Nonlocal Point Boundary Conditions and Semidefinite Quality Criterion”. Ukrains’kyi Matematychnyi Zhurnal 67, no. 8 (August 25, 2015): 1068–1081. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/2046.