BibTeX

@ARTICLE{iumj19052,
    author = "E. Landesman and A. Lazer",
     title = "Nonlinear Perturbations of Linear Elliptic Boundary Value Problems at Resonance",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 19,
      year = 1970,
     issue = 7,
     pages = "609--623",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj19052}{article}{
     author = {Landesman, E.},
     author = {Lazer, A.},
      title = {Nonlinear Perturbations of Linear Elliptic Boundary Value Problems at Resonance},
    journal = {Indiana Univ. Math. J.},
     volume = {19},
       year = {1970},
     number = {7},
      pages = {609 \ndash 623},
}