1. J. Topper and T. Kawahara, ?Approximate equations for long nonlinear waves on a viscous fluid,? J. Phys. Soc. Jpn.,44, 663 (1978).
2. E. A. Demekhin and V. Ya. Shkadov, ?Theory of solitons in systems with dissipation,? Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza, No. 3, 91 (1986).
3. E. A. Demekhin and V. Ya. Shkadov, ?Solitons in dissipative media,? in: Hydrodynamics and Heat and Mass Transfer of Flows with a Free Surface [in Russian], Institute of Technical Physics, Siberian Branch USSR Academy of Sciences, Novosibirsk (1985), p. 32.
4. T. Tatsumi, ?Irregularity, regularity and singularity of turbulence,? Turbulence and Chaotic Phenomena in Fluids, Iutam (1984), p. 1.
5. T. Kawahara, ?Formation of saturated solitons in a nonlinear dispersive system with instability and dissipation,? Phys. Rev. Lett.,51, 381 (1983).