BibTeX

@ARTICLE{iumj15017,
    author = "Arlan Ramsay",
     title = "A Theorem on Two Commuting Observables",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 15,
      year = 1966,
     issue = 2,
     pages = "227--234",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj15017}{article}{
     author = {Ramsay, Arlan},
      title = {A Theorem on Two Commuting Observables},
    journal = {Indiana Univ. Math. J.},
     volume = {15},
       year = {1966},
     number = {2},
      pages = {227 \ndash 234},
}