BibTeX

@ARTICLE{iumj23030,
    author = "Barbara Jeffcott",
     title = "Commuting Observables in a \sigma-Orthologic",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 23,
      year = 1974,
     issue = 5,
     pages = "369--376",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj23030}{article}{
     author = {Jeffcott, Barbara},
      title = {Commuting Observables in a \sigma-Orthologic},
    journal = {Indiana Univ. Math. J.},
     volume = {23},
       year = {1974},
     number = {5},
      pages = {369 \ndash 376},
}