L. Liu, X. Li, and F. Hu. 15th AIAA/CEAS Aeroacoustics Conference (30th AIAA Aeroacoustics Conference), American Institute of Aeronautics and Astronautics, (May 11, 2009)
L. Tuckerman, and D. Barkley. Numerical Methods for Bifurcation Problems and Large-Scale Dynamical Systems, volume 119 of The IMA Volumes in Mathematics and its Applications, Springer, New York, (2000)