A. V. Dmitruk, “Variations of $v$-change of time in an optimal control problem with state and mixed constraints”, Izv. Math., 87:4 (2023), 726–767
E. R. Avakov, G. G. Magaril-Il'yaev, “Controllability and Second-Order Necessary Conditions for Local Infimum Trajectories in Optimal Control”, Proc. Steklov Inst. Math., 321 (2023), 1–23
E. R. Avakov, G. G. Magaril-Il'yaev, “Gamkrelidze Convexification and Bogolyubov's Theorem”, Math. Notes, 107:4 (2020), 539–551
E. R. Avakov, G. G. Magaril-Il'yaev, “Relaxation and controllability in optimal control problems”, Sb. Math., 208:5 (2017), 585–619
A. D. Ioffe, “On necessary conditions for a minimum”, J. Math. Sci., 217:6 (2016), 751–772
A. V. Dmitruk, N. P. Osmolovskii, “On the proof of Pontryagin's maximum principle by means of needle variations”, J. Math. Sci., 218:5 (2016), 581–598
B. M. Miller, E. Ya. Rubinovich, “Discontinuous solutions in the optimal control problems and their representation by singular space-time transformations”, Autom. Remote Control, 74:12 (2013), 1969–2006
S. M. Aseev, K. O. Besov, A. V. Kryazhimskiy, “Infinite-horizon optimal control problems in economics”, Russian Math. Surveys, 67:2 (2012), 195–253
A. V. Dmitruk, “Approximation Theorem for a Nonlinear Control System with Sliding Modes”, Proc. Steklov Inst. Math., 256 (2007), 92–104
V. I. Gurman, Ni Ming Kang, M. Yu. Ukhin, “Practical control optimization schemes based on the extension principle”, Autom. Remote Control, 67:4 (2006), 538–551