On the Relationship Between Global and Local Controllability. - Andrea Bacciotti; Gianna Stefani (Math. Syst. Theory, 1983)

The second variation at a bang-bang extremal. - Andrei A. Agrachev; Gianna Stefani; PierLuigi Zezza (ECC, 2001)

Minimum time optimality of a bang-bang trajectory. - Laura Poggiolini; Gianna Stefani (CDC, 2002)

Strong Optimality for a Bang-Bang Trajectory. - Andrei A. Agrachev; Gianna Stefani; PierLuigi Zezza (SIAM J. Control. Optim., 2002)

On sufficient optimality conditions for a singular extremal. - Gianna Stefani (CDC, 2003)

State-local optimality of a bang-bang trajectory: a Hamiltonian approach. - Laura Poggiolini; Gianna Stefani (Syst. Control. Lett., 2004)

Minimum time optimality for a bang-singular arc: second order sufficient conditions. - Laura Poggiolini; Gianna Stefani (CDC/ECC, 2005)

Sufficient optimality conditions for a bang-bang trajectory. - Laura Poggiolini; Gianna Stefani (CDC, 2006)

On the Minimum Time Problem for Dodgem Car-Like Bang-Singular Extremals. - Laura Poggiolini; Gianna Stefani (LSSC, 2011)

Minimum-time strong optimality of a singular arc: Extended Dubins problem. - Francesca Carlotta Chittaro; Gianna Stefani (CDC, 2013)

Structural Stability for Bang-Singular-Bang Extremals in the Minimum Time Problem. - Laura Poggiolini; Gianna Stefani (SIAM J. Control. Optim., 2013)

Strong Local Optimality for a Bang-Bang-Singular Extremal: The Fixed-Free Case. - Laura Poggiolini; Gianna Stefani (SIAM J. Control. Optim., 2018)

Constrained bang-bang-singular extremals. - Laura Poggiolini; Gianna Stefani (CDC, 2019)

Strong Local Optimality for a Bang-Bang-Singular Extremal: General Constraints. - Laura Poggiolini; Gianna Stefani (J. Optim. Theory Appl., 2020)