@article{MAN_1982__261_182890,
     author = {Michael Struwe},
     title = {Multiple {Solutions} of {Differential} {Equations} {Without} the {Palais-Smale} {Condition.}},
     journal = {Mathematische Annalen},
     pages = {399--412},
     year = {1982},
     volume = {261},
     zbl = {0506.35034},
     url = {http://geodesic.mathdoc.fr/item/MAN_1982__261_182890/}
}