BibTeX

@ARTICLE{iumj40002,
    author = "Ioannis Athanasopoulos and Sandro Salsa",
     title = "An Application of a Parabolic Comparison Principle to Free Boundary Problems",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 40,
      year = 1991,
     issue = 1,
     pages = "29--32",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj40002}{article}{
     author = {Athanasopoulos, Ioannis},
     author = {Salsa, Sandro},
      title = {An Application of a Parabolic Comparison Principle to Free Boundary Problems},
    journal = {Indiana Univ. Math. J.},
     volume = {40},
       year = {1991},
     number = {1},
      pages = {29 \ndash 32},
}