[1] M. A. Abdou and A. A. Soliman, Modified extended tanh-function
method and its application on nonlinear physical equations, Phy. Lett.
A 353 (2006), 487-492.
[2] Salas Alvaro, Some solutions for a type of generalized
Sawada-Kotera equation, Appl. Math. Comput. 196 (2) (2008),
812-817.
[3] A. P. Fordy and J. Gibbons, Phys. Lett. 75 A (1980), 325.
[4] M. Ito, J. Phys. Soc. Japan 49 (1980), 771-778.
[5] M. Ito, Comp. Phys. Comm. 42 (1986), 351-357.
[6] M. Jimbo and T. Miwa, Publ. RIMS, Kyoto Univ. 19 (1983),
943-1001.
[7] D. Kaup, Stud. Appl. Math. 62 (1980), 189-216.
[8] B. A. Kupershmidt, Phys. Lett. 102A (1984), 213-215.
[9] P. D. Lax, Comm. Pure Appl. Math. 21 (1968), 467-490.
[10] J. Satsuma and D.J. Kaup, J. Phys. Soc. Japan 43 (1977),
692-697.
[11] K. Sawada and T. Kotera, Prog. Theor. Phys. 51 (1974), 1355-1367.