BibTeX

@ARTICLE{iumj20074,
    author = "Ciprian Foias",
     title = "Invariant Para-Closed Subspaces",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 20,
      year = 1971,
     issue = 10,
     pages = "897--900",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj20074}{article}{
     author = {Foias, Ciprian},
      title = {Invariant Para-Closed Subspaces},
    journal = {Indiana Univ. Math. J.},
     volume = {20},
       year = {1971},
     number = {10},
      pages = {897 \ndash 900},
}