BibTeX

@ARTICLE{iumj28047,
    author = "Melvyn Berger",
     title = "Nonlinear Problems with Exactly Three Solutions",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 28,
      year = 1979,
     issue = 4,
     pages = "689--698",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj28047}{article}{
     author = {Berger, Melvyn},
      title = {Nonlinear Problems with Exactly Three Solutions},
    journal = {Indiana Univ. Math. J.},
     volume = {28},
       year = {1979},
     number = {4},
      pages = {689 \ndash 698},
}