BibTeX

@ARTICLE{iumj21034,
    author = "Yanping Chen",
     title = "On the Hyperboloidal Means and the Wave Equation",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 21,
      year = 1972,
     issue = 5,
     pages = "437--447",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj21034}{article}{
     author = {Chen, Yanping},
      title = {On the Hyperboloidal Means and the Wave Equation},
    journal = {Indiana Univ. Math. J.},
     volume = {21},
       year = {1972},
     number = {5},
      pages = {437 \ndash 447},
}