References
- Cambridge Studies in Advanced Math. v.34 A primer of nonlinear analysis 1 A. Ambrosetti;G. Prodi
- J. Differential Equations v.117 An application of a variational reduction method to a nonlinear wave equation 2 Q.H. Choi;T. Jung
- Studia Math. v.120 The multiplicity of solutions and geometry of a nonlinear elliptic equation 3 Q.H. Choi;S. Chun;T. Jung
- J. Math. Anal. Appl. v.107 Some multiplicity results for a class of semilinear elliptic and parabolic boundary value problems 4 A.C. Lazer;P.J. McKenna
- Comm. in P.D.E. v.11 Critical points theory and boundary value problems with nonlinearities crossing multiple eigenvalues Ⅱ
- Rocky Mountain Math. J. v.16 Boundary value problems with jumping nonlinearities 6 K. Schmitt