@article{AIHPC_2009__26_2_675_0,
     author = {Bonheure, Denis and Ramos, Miguel},
     title = {Multiple {Critical} {Points} of {Perturbed} {Symmetric} {Strongly} {Indefinite} {Functionals}},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {675--688},
     publisher = {Elsevier},
     volume = {26},
     number = {2},
     year = {2009},
     doi = {10.1016/j.anihpc.2008.06.002},
     mrnumber = {2504048},
     zbl = {1163.35013},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2008.06.002/}
}