1. J. Weiss, M. Tabor and G. Carnevale, The Painleve property for partial differential equations,J. Math. Phys.,24, 3 (1983), 522.
2. G. Z. Tu, Backlund transformation and conservation law,Acta. Math. Appl. Sinica,4, 1 (1981), 63–68. (in Chinese)
3. Y. Cheng et al, Connections among symmetries, Backlund transformation and Painleve property,Acta. Math. Appl. Sinica,14, 2 (1991), 180–184. (in Chinese)
4. Y. B. Zeng, Recursion operator and Painleve property,Chin. Ann. Math.,12A, 1 (1991). 78–88. (in Chinese)
5. J. Weiss, The Painleve property and Backlund transformations for the sequence of Boussinesq equations.J. Math. Phys. 26, 2 (1985), 258–269.