BibTeX

@ARTICLE{iumj25044,
    author = "D. Clark",
     title = "On Invariant Subspaces of Operators without Multiplicity",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 25,
      year = 1976,
     issue = 6,
     pages = "553--563",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj25044}{article}{
     author = {Clark, D.},
      title = {On Invariant Subspaces of Operators without Multiplicity},
    journal = {Indiana Univ. Math. J.},
     volume = {25},
       year = {1976},
     number = {6},
      pages = {553 \ndash 563},
}