BibTeX

@ARTICLE{iumj33029,
    author = "Domingo Herrero",
     title = "On Quasidiagonal Weighted Shifts and Approximation of Operators",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 33,
      year = 1984,
     issue = 4,
     pages = "549--571",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj33029}{article}{
     author = {Herrero, Domingo},
      title = {On Quasidiagonal Weighted Shifts and Approximation of Operators},
    journal = {Indiana Univ. Math. J.},
     volume = {33},
       year = {1984},
     number = {4},
      pages = {549 \ndash 571},
}