A comparison of classical and high dimensional harmonic balance approaches for a Duffing oscillator. - Liping Liu; Jeffrey P. Thomas; Earl H. Dowell; Peter J. Attar; Kenneth C. Hall (J. Comput. Phys., 2006)

Computationally fast harmonic balance methods for unsteady aerodynamic predictions of helicopter rotors. - Kivanc Ekici; Kenneth C. Hall; Earl H. Dowell (J. Comput. Phys., 2008)