@MISC\{IMM1996-0593,
    author       = "J. Clausen and E. Spang-Hansen",
    title        = "Formalle sprog",
    year         = "1996",
    pages        = "556",
    publisher    = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/593-full.html"
}