BibTeX

@ARTICLE{iumj32033,
    author = "Kazuhiro Yamamoto",
     title = "The Cauchy Problem for Hyperbolic Operators with Non-Smooth Characteristic Roots",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 32,
      year = 1983,
     issue = 3,
     pages = "461--475",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj32033}{article}{
     author = {Yamamoto, Kazuhiro},
      title = {The Cauchy Problem for Hyperbolic Operators with Non-Smooth Characteristic Roots},
    journal = {Indiana Univ. Math. J.},
     volume = {32},
       year = {1983},
     number = {3},
      pages = {461 \ndash 475},
}