BibTeX

@ARTICLE{iumj3648,
    author = "Alberto Enciso and Daniel Peralta-Salas",
     title = "Critical points and level sets in exterior boundary problems",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 58,
      year = 2009,
     issue = 4,
     pages = "1947--1970",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "35B38; 35J05; 35J25;",
}

amsrefs

\bib{iumj3648}{article}{
     author = {Enciso, Alberto},
     author = {Peralta-Salas, Daniel},
      title = {Critical points and level sets in exterior boundary problems},
    journal = {Indiana Univ. Math. J.},
     volume = {58},
       year = {2009},
     number = {4},
      pages = {1947 \ndash 1970},
}