@CONFERENCE\{IMM1987-02915,
    author       = "B. F. Nielsen",
    title        = "A Service Protection Model",
    year         = "1987",
    month        = "aug",
    pages        = "IX.2.1-IX.2",
    booktitle    = "NTS-7",
    volume       = "",
    series       = "",
    editor       = "",
    publisher    = "",
    organization = "",
    address      = "Lund",
    url          = "http://www2.compute.dtu.dk/pubdb/pubs/2915-full.html"
}