1. V. V. Aleksandrov, L. I. Voronin, Yu. N. Glazkov, A. Yu. Ishlinskiy, and V. A. Sadovnichiy, Mathematical Problems of Dynamic Imitation of Aerospace Flight [in Russian], Izd. Mosk. Univ., Moscow (1995).
2. A. E. Bryson and Y. C. Ho, Applied Optimal Control, Blaisdell, Waltham (1968).
3. O. Yu. Cherkasov and A. G. Yakushev, “Singular arcs in the optimal evasion against a proportional navigation vehicle,” J. Optim. Theory Appl., 113, No. 2, 211–226 (2002).
4. O. Y. Cherkasov and A. V. Zarodnyuk, “Brachistochrone problem with Coulomb friction and viscous drag: qualitative analysis,” in: Preprints 1st Conf. on Modelling, Identification and Control of Nonlinear System, MICNON 2015, IFAC, St. Petersburg, Russia, 24–26 June (2015), pp. 1018–1023.
5. O. Y. Cherkasov and A. V. Zarodnyuk, “Qualitative analysis of optimal trajectories of the point mass motion in a resisting medium and the brachistochrone problem,” J. Comput. Syst. Sci. Int., 54, No. 1, 39–47 (2015).