BibTeX

@ARTICLE{iumj15045,
    author = "Donald Babbitt",
     title = "Invariant Coefficient Operators on Pseudo-Riemannian Manifolds",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 15,
      year = 1966,
     issue = 4,
     pages = "643--665",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj15045}{article}{
     author = {Babbitt, Donald},
      title = {Invariant Coefficient Operators on Pseudo-Riemannian Manifolds},
    journal = {Indiana Univ. Math. J.},
     volume = {15},
       year = {1966},
     number = {4},
      pages = {643 \ndash 665},
}