BibTeX

@ARTICLE{iumj23043,
    author = "Antonio Ciampi",
     title = "Classification of Hamiltonian Linear Systems",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 23,
      year = 1974,
     issue = 6,
     pages = "513--526",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj23043}{article}{
     author = {Ciampi, Antonio},
      title = {Classification of Hamiltonian Linear Systems},
    journal = {Indiana Univ. Math. J.},
     volume = {23},
       year = {1974},
     number = {6},
      pages = {513 \ndash 526},
}