BibTeX

@ARTICLE{iumj58003,
    author = "R. Duffin",
     title = "A Variational Problem Relating to Cooling Fins",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 8,
      year = 1959,
     issue = 1,
     pages = "47--56",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj58003}{article}{
     author = {Duffin, R.},
      title = {A Variational Problem Relating to Cooling Fins},
    journal = {Indiana Univ. Math. J.},
     volume = {8},
       year = {1959},
     number = {1},
      pages = {47 \ndash 56},
}