BibTeX

@ARTICLE{iumj25074,
    author = "S. Ahmad and A. Lazer and J. Paul",
     title = "Elementary Critical Point theory and Perturbations of Elliptic Boundary Value Problems at Resonance",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 25,
      year = 1976,
     issue = 10,
     pages = "933--944",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj25074}{article}{
     author = {Ahmad, S.},
     author = {Lazer, A.},
     author = {Paul, J.},
      title = {Elementary Critical Point theory and Perturbations of Elliptic Boundary Value Problems at Resonance},
    journal = {Indiana Univ. Math. J.},
     volume = {25},
       year = {1976},
     number = {10},
      pages = {933 \ndash 944},
}