BibTeX

@ARTICLE{iumj16045,
    author = "P. Church",
     title = "Differentiable Maps with Non-Negative Jacobian",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 16,
      year = 1967,
     issue = 7,
     pages = "703--708",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj16045}{article}{
     author = {Church, P.},
      title = {Differentiable Maps with Non-Negative Jacobian},
    journal = {Indiana Univ. Math. J.},
     volume = {16},
       year = {1967},
     number = {7},
      pages = {703 \ndash 708},
}