@article{10_4064_ap79_2_5,
     author = {Marino Badiale},
     title = {Infinitely many solutions for a semilinear
 elliptic equation in ${\Bbb R}^N$ via a perturbation method},
     journal = {Annales Polonici Mathematici},
     pages = {139--156},
     publisher = {mathdoc},
     volume = {79},
     number = {2},
     year = {2002},
     doi = {10.4064/ap79-2-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap79-2-5/}
}