@Article{deMoor:HOSC:03,
  author =       "Oege de Moor and David Lacey and Eric Van Wyk",
  title =        "Universal Regular Path Queries",
  journal =      "Higher-Order and Symbolic Computation",
  volume =       "16",
  number =       "1",
  pages =        "15--35",

  year =         "2003",
}