Wassim M. Haddad, Michael C. Stasko, Tomohisa Hayakawa. Direct adaptive control for nonlinear matrix second-order systems with time-varying and sign-indefinite damping and stiffness operators. In American Control Conference, ACC 2003, Denver, CO, USA, June 4-6 2003. pages 2919-2924, IEEE, 2003. [doi]
Abstract is missing.