Trust Region Problems and Nonsymmetric Eigenvalue Perturbations. - Ronald J. Stern; Henry Wolkowicz (SIAM J. Matrix Anal. Appl., 1994)

Indefinite Trust Region Subproblems and Nonsymmetric Eigenvalue Perturbations. - Ronald J. Stern; Henry Wolkowicz (SIAM J. Optim., 1995)

Feedback Stabilization and Lyapunov Functions. - Francis H. Clarke; Yuri S. Ledyaev; Ludovic Rifford; Ronald J. Stern (SIAM J. Control. Optim., 2000)

Brockett's stabilization condition under state constraints. - Ronald J. Stern (Syst. Control. Lett., 2002)

State Constrained Feedback Stabilization. - Francis H. Clarke; Ronald J. Stern (SIAM J. Control. Optim., 2003)

Characterization of the State Constrained Minimal Time Function. - Ronald J. Stern (SIAM J. Control. Optim., 2004)

Lyapunov and feedback characterizations of state constrained controllability and stabilization. - Francis H. Clarke; Ronald J. Stern (Syst. Control. Lett., 2005)

Semiconcavity of the bilateral minimal time function: The linear case. - Chadi Nour; Ronald J. Stern (Syst. Control. Lett., 2008)