BibTeX

@ARTICLE{iumj58017,
    author = "Erhard Heinz",
     title = "An Elementary Analytic Theory of the Degree of Mapping in n-Dimensional Space",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 8,
      year = 1959,
     issue = 2,
     pages = "231--247",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj58017}{article}{
     author = {Heinz, Erhard},
      title = {An Elementary Analytic Theory of the Degree of Mapping in n-Dimensional Space},
    journal = {Indiana Univ. Math. J.},
     volume = {8},
       year = {1959},
     number = {2},
      pages = {231 \ndash 247},
}