1. G.H. Zhao: The Structural Dynamics (China water conservancy and hydropower press, 1995).
2. G.W. Housner: J. Seismic Bull., Vol. 47 (1957), p.15.
3. M.C. Wang: Finite Element Method (Tsinghua university press, 2003).
4. B.Z. Yue and X.T. Li: Journal of mechanics and practice, Vol. 24 (2002), p.7.
5. Y.H. Zhang and X. Hu: Journal of hydraulic engineering, Vol. 36 (2005), p.1307.