1. Super-critical Neumann problems on unbounded domains;Alves;Nonlinearity,2020
2. Functional Analysis, Sobolev Spaces and Partial Differential Equations;Brezis,2010
3. Hamiltonian elliptic systems: a guide to variational frameworks;Bonheure;Port. Math.,2014
4. Strongly indefinite functionals with perturbed symmetries and multiple solutions of nonsymmetric elliptic systems;Clapp;Electron. J. Differ. Equ.,2004