BibTeX

@ARTICLE{iumj27056,
    author = "John Daughtry",
     title = "The Maximal Nonnegative Reducing Subspaces of J-Selfadjoint Operators",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 27,
      year = 1978,
     issue = 5,
     pages = "853--858",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj27056}{article}{
     author = {Daughtry, John},
      title = {The Maximal Nonnegative Reducing Subspaces of J-Selfadjoint Operators},
    journal = {Indiana Univ. Math. J.},
     volume = {27},
       year = {1978},
     number = {5},
      pages = {853 \ndash 858},
}