@ARTICLE\{IMM1994-01880,
    author       = "M. R. Hansen",
    title        = "Model-Checking Discrete Duration Calculus",
    year         = "1994",
    pages        = "826-845",
    journal      = "Formal Aspects of Computing",
    volume       = "6A",
    editor       = "",
    number       = "",
    publisher    = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1880-full.html"
}