BibTeX

@ARTICLE{iumj18005,
    author = "Karl Gustafson",
     title = "State Diagrams for Hilbert Space Operators",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 18,
      year = 1969,
     issue = 1,
     pages = "33--45",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj18005}{article}{
     author = {Gustafson, Karl},
      title = {State Diagrams for Hilbert Space Operators},
    journal = {Indiana Univ. Math. J.},
     volume = {18},
       year = {1969},
     number = {1},
      pages = {33 \ndash 45},
}