KAPUSTYAN, V. E.; PYSHNOGRAEV, I. A. Problem of Optimal Control for Parabolic-Hyperbolic Equations with Nonlocal Point Boundary Conditions and Semidefinite Quality Criterion. Ukrains’kyi Matematychnyi Zhurnal, v. 67, n. 8, p. 1068-1081, 25 Aug. 2015.