@CONFERENCE\{IMM2003-02868,
    author       = "M. R. Hansen",
    title        = "Duration Calculus (Extended Abstract)",
    year         = "2003",
    pages        = "66-84",
    booktitle    = "Workshop on Interval Logics and Duration Calculi, {ESSLLI'}03",
    volume       = "",
    series       = "",
    editor       = "Valentin Goranko and Angelo Montanari",
    publisher    = "",
    organization = "",
    address      = "",
    note         = "Invited Talk",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2868-full.html"
}