References
- Benci , V. and Fortunato , D . 1981 . Gomm. P. D. E , 6 : 249 – 272 .
- Berestycki , H. and Lions , P.L . 1980 . Bifurcation phenomena in mathematical physics and related topics , 6 : 269 – 292 .
- Bongers , A. , Heinz , H.P and Kupper , T . 1983 . J. Diff. Equat , 47 : 327 – 357 .
- Heinz , P. 1986 . J. Diff. Equat , 64 : 79 – 108 .
- Lions , P. L. 1984 . Ann. I. H. P. AnaTT non lineaire , 1 : 109 – 145 .
- Lions , P.L. 1984 . Ann. I. H. P. Anal, non lineaire , 1 : 225 – 283 .
- Strauss , W. 1977 . Comm. Math. Phys , 55 : 149 – 162 .
- Stuart , C.A. 1982 . Proc. London Math. Soc , 45 : 162 – 192 .
- Stuart , G.A. 1983 . Lect. Notes in Math , 1017 : 575 – 596 .
- Zhu , X. P. and Cao , D.M . The concentration-compactness principle in nonlinear elliptic equation
- Zhu , X.P. and Zhou , H.S . Bifurcation for nonlinear elliptic equations on unbounded domains . Acta Math. Sci ,