BibTeX

@ARTICLE{iumj34038,
    author = "K. Hollig and M. Pilant",
     title = "Regularity of the Free Boundary for the Porous Medium Equation",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 34,
      year = 1985,
     issue = 4,
     pages = "723--732",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj34038}{article}{
     author = {Hollig, K.},
     author = {Pilant, M.},
      title = {Regularity of the Free Boundary for the Porous Medium Equation},
    journal = {Indiana Univ. Math. J.},
     volume = {34},
       year = {1985},
     number = {4},
      pages = {723 \ndash 732},
}