BibTeX

@ARTICLE{iumj17038,
    author = "J. Diaz and F. Metcalf",
     title = "A Functional Equation for the Rayleigh Quotient for Eigenvalues, and Some Applications",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 17,
      year = 1968,
     issue = 7,
     pages = "623--630",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj17038}{article}{
     author = {Diaz, J.},
     author = {Metcalf, F.},
      title = {A Functional Equation for the Rayleigh Quotient for Eigenvalues, and Some Applications},
    journal = {Indiana Univ. Math. J.},
     volume = {17},
       year = {1968},
     number = {7},
      pages = {623 \ndash 630},
}