BibTeX

@ARTICLE{iumj30017,
    author = "Domingo Herrero",
     title = "Quasidiagonality, Similarity and Approximation by Nilpotent Operators",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 30,
      year = 1981,
     issue = 2,
     pages = "199--233",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj30017}{article}{
     author = {Herrero, Domingo},
      title = {Quasidiagonality, Similarity and Approximation by Nilpotent Operators},
    journal = {Indiana Univ. Math. J.},
     volume = {30},
       year = {1981},
     number = {2},
      pages = {199 \ndash 233},
}