[1] Sang Ye-Ji. Multiplicity results and bifurcation for nonlinear elliptic problems involving critical Sobolev
exponents. Nonlinear Analysis, 1994, 23(12): 1493-1498

[2] Silva Elves A de B e, Soares Sergio H M. Quasilinear Dirichlet problems in RN with critical growth.
Nonlinear Analysis, 2001, 43: 1-20

[3] Shen Yaotian, Guo Xinkang. On the existence of infinitely many critical pointR s of the even functional

F(x, u,∇u)dx in W
1,p
0 . Acta Math Sci, 1987, 17(2): 187-195

[4] Li Shujie, Zou WenMing. Remarks on a class of elliptic problems with critical exponents. Nonlinear
Analysis, 1998, 12(6): 769-774

[5] Garcia Azorero J, Peral Alonso I. Multiplicity of solutions for elliptic problems with critical exponent or
with a nonsymmetric term. Trans Amer Math Soc, 1991, 323(2): 877-895

[6] Clark David C. A variant of the Lusternik-Schnirelman theory. Indiana Univ Math J, 1972, 22: 65-74

[7] Rabinowitz P H. Multiple critical points of perturbed symmetric functionals. Trans Amer Math Soc, 1982,
272(2): 753-769

[8] Rabinowitz P H. Minimax methods in critical point theory with applications to differetial equations.
CBMS Regional Conf Ser in Math, No.65, Amer Math Soc, Providence, R I, 1986

[9] Lions P L. The concentration-compactness principle in the calculus of variation, the limit case, parts 1,2.
Rev Mat Iberoamericana, 1985, (1): 145-201; 45-121

[10] Shen Yaotian, Yan Shusheng. The variational methods of quasilinear elliptic equation. Second Edition.
Guang Zhou: The Press of South China University of Technology, 1999