V.E. Zakharov. "Stability of periodic waves of finite amplitude on the surface of a deep fluid."
Zh. Prikl. Mekh. Tekh. Fiz. (1968).
F. Dias and T. Bridges. "The numerical computation of freely propagating time-
dependent irrotational waves." Fluid Dynamics Research (2006)
J. Wilkening. "Non-existence of a limiting standing wave of extreme form on
deep water," Submitted to Phys. Rev. Lett.
P. Holmes, J. Lumley, and G. Bekooz. "Turbulence, Coherent Structures, Dynamical Systems, and
Symmetry," Cambridge U. Press (1996)