Multiplicity of critical points in presence of a linking: application to a superlinear boundary value problem
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- Mugnai, D. Nonlinear differ. equ. appl. (2004) 11: 379. doi:10.1007/s00030-004-2016-2
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We consider a general nonlinear elliptic problem of the second order whose associated functional presents two linking structures and we prove the existence of three nontrivial solutions to the problem.