BibTeX

@ARTICLE{iumj20044,
    author = "S. Berberian",
     title = "The Weyl Spectrum of an Operator",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 20,
      year = 1971,
     issue = 6,
     pages = "529--544",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj20044}{article}{
     author = {Berberian, S.},
      title = {The Weyl Spectrum of an Operator},
    journal = {Indiana Univ. Math. J.},
     volume = {20},
       year = {1971},
     number = {6},
      pages = {529 \ndash 544},
}