BibTeX

@ARTICLE{iumj21002,
    author = "Floris Takens and James White",
     title = "Morse Theory of Double Normals of Immersions",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 21,
      year = 1972,
     issue = 1,
     pages = "11--17",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj21002}{article}{
     author = {Takens, Floris},
     author = {White, James},
      title = {Morse Theory of Double Normals of Immersions},
    journal = {Indiana Univ. Math. J.},
     volume = {21},
       year = {1972},
     number = {1},
      pages = {11 \ndash 17},
}