3B. Ricceri.On a three critical points theorem[J].Archiv der Mathematik.2000(3)
4LHai-shen,,Donal O Regan,Ravi P Agarwal.Positive solution for singularp-Laplace equatios withsign-changing nonlinearities using inequality theory[].Journal of Applied Mathematics.2005
5E.Zeidler.Nonlinear functional analysis and its applications[]..1990
6Yongxiang Li.Positive solutions of second-order boundary value problems with signchanging nonlinear terms[].Journal of Mathematical Analysis and Applications.2003
7Bonanno,G.Existence of three solutions for a two point boundary value problem[].Applied Mathematics Letters.2000
8Bonanno,G.Some remarks on a three critical points theorem[].Nonlinear Analysis.2003
9Ricceri,B.On a three critical points theorem[].Archiv der Mathematik.2000
10Bonanno,G.A minimax inequality and its applications to ordinary differential equations[].Journal of Mathematical Analysis and Applications.2002