@CONFERENCE\{IMM1999-01909,
    author       = "T. M. Rasmussen",
    title        = "Signed Interval Logic",
    year         = "1999",
    pages        = "157-171",
    booktitle    = "Computer Science Logic, {CSL'}99",
    volume       = "1683",
    series       = "LNCS",
    editor       = "",
    publisher    = "Springer-Verlag",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1909-full.html"
}