BibTeX

@ARTICLE{iumj12036,
    author = "Norman Levinson",
     title = "Dirichlet Problem for \Delta u = f(P, u)",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 12,
      year = 1963,
     issue = 4,
     pages = "567--575",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj12036}{article}{
     author = {Levinson, Norman},
      title = {Dirichlet Problem for \Delta u = f(P, u)},
    journal = {Indiana Univ. Math. J.},
     volume = {12},
       year = {1963},
     number = {4},
      pages = {567 \ndash 575},
}