@article{MAN_1986__276_164227,
     author = {Vittorio Cafagna and Gabriella Tarantello},
     title = {Multiple {Solutions} for {Some} {Semilinear} {Elliptic} {Equations.}},
     journal = {Mathematische Annalen},
     pages = {643--656},
     publisher = {mathdoc},
     volume = {276},
     year = {1986},
     zbl = {0599.35063},
     url = {http://geodesic.mathdoc.fr/item/MAN_1986__276_164227/}
}