1. Dong, L., Liao, J.: Neural network-based biomass estimation in the Poyang lake wetland using Envisat ASAR data. Remote Sens. Technol. Appl. 24, 325–330 (2009)
2. http://en.wikipedia.org/wiki/Poyang_Lake (2010)
3. Zhang, F., Gao, S.: On the migratory birds population model with pulse diffusion. In: Proceedings of the 7th Conference on Biological Dynamic System and Stability of Differential Equation, vol. 1, pp. 417–421. World Academic Press, Liverpool (2010)
4. Chatterjee, S.: Role of migratory birds under environmental fluctuation—a mathematical study. J. Biol. Syst. 16, 81–106 (2008)
5. Wang, W., Shen, J.: Partial survival and extinction in two competing species with impulses. Nonlinear Anal., Real World Appl. 10, 1243–1254 (2009)