BibTeX

@ARTICLE{iumj20017,
    author = "Garry Ludwig",
     title = "Analogue of the Goldberg-Sachs Theorem",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 20,
      year = 1971,
     issue = 2,
     pages = "185--191",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj20017}{article}{
     author = {Ludwig, Garry},
      title = {Analogue of the Goldberg-Sachs Theorem},
    journal = {Indiana Univ. Math. J.},
     volume = {20},
       year = {1971},
     number = {2},
      pages = {185 \ndash 191},
}