1. Bendat, J. S., and Piersol, A.G., 1971, Random data: Analysis and measurement procedures: Wiley-Interseience.
2. Chen, Y., and Shi, P.J., 2007. Natural disasters: Beijing Normal University Press, Beijing, 70–71.
3. Engdahl, E.R., and Villasenor, A., 2002, Global Seismicity: 1900–2000.00[A]. In: Lee H K, Kanamori H, Jennings PC et al. eds. International Handbook of Earthquake and Engineering Seismology, Part A. Academic Press, Amsterdam, Netherland.
4. Guo, Z.J., Qin, B.Y., and Guo A.N., 1996, Geogas Coupling and Natural Disaster Prediction, Seismological press, Beijing, China.
5. Guo, Z.J., and Wang, W.L., 2015, Brief Discussion on Natural Disaster Prediction, Wuhan University Press, Wuhan, China.