@MISC\{IMM1995-02005,
    author       = "Z. Liu and M. R. Hansen and J. Madsen and J. P. Brage",
    title        = "Real-Time Semantics for Data Flow Graphs",
    year         = "1995",
    publisher    = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2005-full.html"
}