BibTeX

@ARTICLE{iumj29006,
    author = "F. Narcowich",
     title = "Analytic Properties of the Boundary of the Numerical Range",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 29,
      year = 1980,
     issue = 1,
     pages = "67--77",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj29006}{article}{
     author = {Narcowich, F.},
      title = {Analytic Properties of the Boundary of the Numerical Range},
    journal = {Indiana Univ. Math. J.},
     volume = {29},
       year = {1980},
     number = {1},
      pages = {67 \ndash 77},
}