BibTeX

@ARTICLE{iumj21012,
    author = "Herbert Amann",
     title = "On the Existence of Positive Solutions of Nonlinear Elliptic Boundary value Problems",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 21,
      year = 1972,
     issue = 2,
     pages = "125--146",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj21012}{article}{
     author = {Amann, Herbert},
      title = {On the Existence of Positive Solutions of Nonlinear Elliptic Boundary value Problems},
    journal = {Indiana Univ. Math. J.},
     volume = {21},
       year = {1972},
     number = {2},
      pages = {125 \ndash 146},
}