@CONFERENCE\{IMM1998-02056,
    author       = "H. H. L{\o}vengreen and M. U. S{\o}rensen",
    title        = "Interval-based Specification of Concurrent Objects",
    year         = "1998",
    month        = "aug",
    pages        = "111-131",
    booktitle    = "ESSLLI'98 workshop on Duration Calculus",
    volume       = "",
    series       = "",
    editor       = "Michael R. Hansen",
    publisher    = "{DFKI,} \{Saarbrücken\}",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2056-full.html"
}