Local Controllability and a Family of Maximum Principles for a Free Time Optimal Control Problem. - Evgeny Avakov; Georgii G. Magaril-Il'yaev (SIAM J. Control. Optim., 2020)

Necessary Second-Order Conditions for a Local Infimum in an Optimal Control. - Evgeny Avakov; Georgii G. Magaril-Il'yaev (SIAM J. Control. Optim., 2022)