BibTeX

@ARTICLE{iumj20094,
    author = "Joachim Hempel",
     title = "Multiple Solutions for a Class of Nonlinear Boundary Value Problems",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 20,
      year = 1971,
     issue = 11,
     pages = "983--996",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj20094}{article}{
     author = {Hempel, Joachim},
      title = {Multiple Solutions for a Class of Nonlinear Boundary Value Problems},
    journal = {Indiana Univ. Math. J.},
     volume = {20},
       year = {1971},
     number = {11},
      pages = {983 \ndash 996},
}