@CONFERENCE\{IMM2001-01910,
    author       = "T. M. Rasmussen",
    title        = "Labelled Natural Deduction for Interval Logics",
    year         = "2001",
    pages        = "308-323",
    booktitle    = "Computer Science Logic, {CSL'}01",
    volume       = "2142",
    series       = "LNCS",
    editor       = "",
    publisher    = "Springer-Verlag",
    organization = "",
    address      = "",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/1910-full.html"
}