1. V. M. Vigak, Control of Temperature Stresses and Displacements [in Russian], Naukova Dumka, Kiev (1988).
2. G. Duvaut and J. L. Lions, Les Inéquations en Mécanique et en Physique, Dunod, Paris (1972).
3. S. D. Ivasyshen, Green Matrices of General Inhomogeneous Boundary Problems for Systems Parabolic by Petrovskii [in Russian], Preprint, Institute of Mathematics, Academy of Sciences of Ukr. SSR, Kyiv (1968).
4. V. A. Il’in and E. I. Moiseev, “Optimization of the control of elastic boundary forces at two ends of a string for an arbitrary sufficiently long time interval T ,” Dokl. Ross. Akad. Nauk, 417, No. 4, 456–463 (2007).
5. J. L. Lions, Contrôle Optimal de Systèmes Gouvernées par des Equations aux Dérivées Partielles, Dunod, Paris (1971).