Introducing some classes of stable systems without any smooth Lyapunov functions. - Majid Akbarian; Naser Pariz; Aghileh Heydari (Commun. Nonlinear Sci. Numer. Simul., 2023)

Constituting an Extension of Lyapunov's Direct Method. - Majid Akbarian; Naser Pariz; Aghileh Heydari (SIAM J. Control. Optim., 2024)