1. Krasovskii, N.N., Teoriya upravleniya dvizheniem (Motion Control Theory), Moscow: Nauka, 1968.
2. Zubov, V.I., Lektsii po teorii upravleniya (Lectures on the Control Theory), Moscow: Nauka, 1975.
3. Egorov, A.I., Osnovy teorii upravleniya (Fundamentals of the Control Theory), Moscow: Fizmatlit, 2004.
4. Dem’yanov, V.F., Usloviya ekstremuma i variatsionnoe ischislenie (Extremum Conditions and Variational Calculus), Moscow: Vysshaya Shkola, 2005.
5. Tamasyan, G.Sh., Numerical Methods in the Problems of Variational Calculus for Functionals Depending on Higher-order Derivatives, Probl. Mat. Anal., 2012, no. 67, pp. 113–132.