BibTeX

@ARTICLE{iumj22045,
    author = "R. Duffin and Elmor Peterson",
     title = "Reversed Geometric Programs Treated by Harmonic Means",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 22,
      year = 1973,
     issue = 6,
     pages = "531--550",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj22045}{article}{
     author = {Duffin, R.},
     author = {Peterson, Elmor},
      title = {Reversed Geometric Programs Treated by Harmonic Means},
    journal = {Indiana Univ. Math. J.},
     volume = {22},
       year = {1973},
     number = {6},
      pages = {531 \ndash 550},
}