1. Butkovskii A.G., Theory of optimal control of distributed parameter systems (Nauka, Moscow, 1965)
2. Rapoport E’.Ya, Optimal’noe upravlenie sistemami s raspredelenny’mi parametrami (Vy’sshaya shkola, Moscow, 2009)
3. Borodulin B.B., Livshits M.Y., EPJ Web Conf. 110 (2016)
4. Efimov A.P., Conf. – Samara scientific centre of RAS 195 (2006)