Publications by J.A. Acosta 2013 -- I. Sarras, J.Á. Acosta, R. Ortega, A.D. MahindrakarConstructive immersion and invariance stabilization for a class of underactuated mechanical systems 2009 -- J.A. Acosta, E. Panteley, R. OrtegaA new strict Lyapunov function for fully-actuated mechanical systems controlled by IDA-PBC