1. Adams, R., Fournier, J.: Sobolev Spaces, 2nd edn. Academic Press, Amsterdam (2003)
2. Chang, K., Lin, Q.: Teaching Materials of Functional Analysis. Peking University Press, Beijing (2010)
3. Chen, Y., Mckenna, P.: Traveling waves in a nonlinear suspension beam: theoretical results and numerical observations. J. Differ. Equ. 135, 325–355 (1997)
4. Chen, Z.: Partial Differential Equation. University of Science and Technology of China Press, Hefei (2004)
5. Deng, Y., Wang, G.: On inhomogeneous biharmonic equations involving critical exponents. Proc. R. Soc. Lond. Ser. A Math. Phys. Eng. Sci. 129, 925–946 (1999)