BibTeX

@ARTICLE{iumj21072,
    author = "Ciprian Foias",
     title = "Invariant Para-Closed Subspaces.",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 21,
      year = 1972,
     issue = 10,
     pages = "887--906",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj21072}{article}{
     author = {Foias, Ciprian},
      title = {Invariant Para-Closed Subspaces.},
    journal = {Indiana Univ. Math. J.},
     volume = {21},
       year = {1972},
     number = {10},
      pages = {887 \ndash 906},
}