Implementation of a neural network tracking controller for a single flexible link: comparison with PD and PID controllers. - Luis B. Gutiérrez; Frank L. Lewis; J. Andy Lowe (IEEE Trans. Ind. Electron., 1998)

Hybrid control for a class of underactuated mechanical systems. - Rafael Fierro; Frank L. Lewis; J. Andy Lowe (IEEE Trans. Syst. Man Cybern. Part A, 1999)