BibTeX

@ARTICLE{iumj58045,
    author = "Richard Bellman and Robert Kalaba",
     title = "Functional Equations, Wave Propagation and Invariant Imbedding",
   journal = "Indiana Univ. Math. J.",
  fjournal = "Indiana University Mathematics Journal",
    volume = 8,
      year = 1959,
     issue = 5,
     pages = "683--704",
      issn = "0022-2518",
     coden = "IUMJAB",
   mrclass = "",
}

amsrefs

\bib{iumj58045}{article}{
     author = {Bellman, Richard},
     author = {Kalaba, Robert},
      title = {Functional Equations, Wave Propagation and Invariant Imbedding},
    journal = {Indiana Univ. Math. J.},
     volume = {8},
       year = {1959},
     number = {5},
      pages = {683 \ndash 704},
}