BibTeX

@ARTICLE{iumj57034,
    author = "Robert Lewis",
     title = "Discontinuous Initial Value Problems for Symmetric Hyperbolic Linear Differential Equations",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 7,
      year = 1958,
     issue = 4,
     pages = "571--592",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj57034}{article}{
     author = {Lewis, Robert},
      title = {Discontinuous Initial Value Problems for Symmetric Hyperbolic Linear Differential Equations},
    journal = {Indiana Univ. Math. J.},
     volume = {7},
       year = {1958},
     number = {4},
      pages = {571 \ndash 592},
}